Name
nth term of quadratic sequences
n2 - n - 1
0.5n2 + 1
2n2 + 3
n2 + 2n
n2
5, 12, 23, 38…
2, 4, 8, 14…
1.5, 3, 5.5, 9…
4.5, 6, 8.5, 12…
n2 + 2n - 1
4n2 + n + 1
2n2 + 1
2n2 - n + 1
0.5n2 + 4
5, 11, 21, 35…
6, 19, 40, 69…
2, 6, 14, 26…
3, 9, 19, 33…
4n2 - n
2n2 + n + 2
n2 + n + 1
n2 + 3
n2 + 2n + 1
0, 4, 12, 24…
2, 7, 16, 29…
2, 6, 12, 20…
4, 9, 16, 25…
2n2 - 2n
n2 - 1
n2 + n
n2 + 10
2n2 - 2n + 2
2, 7, 14, 23…
-1, 2, 7, 14…
3, 7, 13, 21…
3, 14, 33, 60…
n2 - 2
n2-2
n2 - n + 2
n2 + 1
n2 + 1
-1, 1, 5, 11…
11, 14, 19, 26…
2, 5, 10, 17…
3, 8, 15, 24…
Missing expression
Name
nth term of quadratic sequences
n2 - 2
2n2 + 3
n2 + n + 1
n2 - 1
n2 + 1
1.5, 3, 5.5, 9…
-1, 1, 5, 11…
5, 12, 23, 38…
3, 8, 15, 24…
n2 - n - 1
2n2 - 2n
4n2 + n + 1
n2 + 1
n2 - n + 2
5, 11, 21, 35…
3, 7, 13, 21…
3, 14, 33, 60…
0, 4, 12, 24…
n2 + 2n - 1
n2 + 2n
n2
2n2 + 1
0.5n2 + 1
3, 9, 19, 33…
2, 5, 10, 17…
-1, 2, 7, 14…
4.5, 6, 8.5, 12…
n2 + n
n2-2
n2 + 10
0.5n2 + 4
2n2 - 2n + 2
2, 7, 16, 29…
2, 7, 14, 23…
2, 6, 14, 26…
11, 14, 19, 26…
2n2 - n + 1
n2 + 2n + 1
4n2 - n
2n2 + n + 2
n2 + 3
2, 6, 12, 20…
4, 9, 16, 25…
6, 19, 40, 69…
2, 4, 8, 14…
Missing expression
www.mathsbox.org.uk
Name
nth term of quadratic sequences
4n2 + n + 1
2n2 - n + 1
n2 + n
n2 + 3
4n2 - n
2, 6, 14, 26…
2, 4, 8, 14…
3, 9, 19, 33…
1.5, 3, 5.5, 9…
2n2 + n + 2
n2
n2 - 2
n2 + n + 1
n2 + 2n
4, 9, 16, 25…
0, 4, 12, 24…
2, 7, 16, 29…
2, 7, 14, 23…
n2 + 2n - 1
n2 + 1
n2-2
2n2 - 2n
n2 + 10
5, 12, 23, 38…
2, 6, 12, 20…
3, 7, 13, 21…
4.5, 6, 8.5, 12…
n2 + 1
n2 + 2n + 1
0.5n2 + 4
2n2 + 1
n2 - 1
-1, 1, 5, 11…
-1, 2, 7, 14…
3, 14, 33, 60…
3, 8, 15, 24…
n2 - n + 2
n2 - n - 1
0.5n2 + 1
2n2 + 3
2n2 - 2n + 2
11, 14, 19, 26…
6, 19, 40, 69…
5, 11, 21, 35…
2, 5, 10, 17…
Missing expression
Name
nth term of quadratic sequences
2n2 + n + 2
n2 + 1
n2 + n + 1
n2 + 2n
n2 + 2n - 1
2, 6, 12, 20…
3, 14, 33, 60…
11, 14, 19, 26…
4, 9, 16, 25…
2n2 - 2n
n2 - n + 2
2n2 + 3
0.5n2 + 4
4n2 - n
5, 11, 21, 35…
2, 7, 16, 29…
2, 7, 14, 23…
5, 12, 23, 38…
n2 + n
n2 + 3
n2
2n2 - n + 1
n2 - 2
2, 6, 14, 26…
2, 4, 8, 14…
-1, 2, 7, 14…
6, 19, 40, 69…
2n2 - 2n + 2
n2 - 1
n2 + 10
n2 + 1
4n2 + n + 1
2, 5, 10, 17…
4.5, 6, 8.5, 12…
1.5, 3, 5.5, 9…
-1, 1, 5, 11…
n2 - n - 1
n2-2
2n2 + 1
n2 + 2n + 1
0.5n2 + 1
0, 4, 12, 24…
3, 9, 19, 33…
3, 7, 13, 21…
3, 8, 15, 24…
Missing expression
www.mathsbox.org.uk