A065230 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 hexagonal numbers. The first elements of the rows form a(n).

1, 1, 3, 6, 4, 9, 15, 7, 15, 24, 6, 17, 29, 42, 11, 26, 42, 59, 11, 30, 50, 71, 2, 25, 49, 74, 100, 7, 35, 64, 94, 125, 4, 37, 71, 106, 142, 179, 27, 66, 106, 147, 189, 1, 45, 90, 136, 183, 231, 4, 54, 105, 157, 210, 264, 319, 50, 107, 165, 224, 284, 345, 29, 92, 156, 221

Offset

0,3

Links

Table of n, a(n) for n=0..65.

Crossrefs

Cf. A064766, A064865, A065221-A065229, A065231-A065223.

Sequence in context: A143940 A321773 A083349 * A316478 A242224 A294671

Adjacent sequences: A065227 A065228 A065229 * A065231 A065232 A065233

Keyword

easy,nonn

Author

Floor van Lamoen, Oct 22 2001

Status

approved