A065231 Fill a triangular array by rows by writing numbers 1 up to b(0), 1 up to b(1), etc., where b(n) are the heptagonal numbers (A000566). The first elements of the rows form a(n).

1, 1, 3, 6, 3, 8, 14, 3, 11, 20, 30, 7, 19, 32, 46, 6, 22, 39, 57, 76, 15, 36, 58, 81, 105, 18, 44, 71, 99, 128, 10, 41, 73, 106, 140, 175, 22, 59, 97, 136, 176, 217, 24, 67, 111, 156, 202, 249, 11, 60, 110, 161, 213, 266, 320, 33, 89, 146, 204, 263, 323, 384, 43, 106

Offset

0,3

Links

Table of n, a(n) for n=0..63.

Crossrefs

Cf. A064766, A064865, A065221-A065230, A065232-A065223.

Sequence in context: A337903 A358787 A264767 * A351102 A019918 A260303

Adjacent sequences: A065228 A065229 A065230 * A065232 A065233 A065234

Keyword

easy,nonn

Author

Floor van Lamoen, Oct 22 2001

Status

approved