A065227 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 triangular numbers. The first elements of the rows form a(n).

1, 1, 3, 3, 1, 6, 2, 9, 2, 11, 21, 11, 23, 8, 22, 1, 17, 34, 7, 26, 46, 12, 34, 57, 15, 40, 66, 15, 43, 72, 11, 42, 74, 2, 36, 71, 107, 24, 62, 101, 5, 46, 88, 131, 22, 67, 113, 160, 37, 86, 136, 187, 49, 102, 156, 1, 57, 114, 172, 231, 60, 121, 183, 246, 57, 122, 188, 255

Offset

0,3

Links

Table of n, a(n) for n=0..67.

Crossrefs

Mini-index to these sequences: A064766, A064865, A064866, A065221-A655234 are all of the same type. See A064766 for a detailed explanation.

Sequence in context: A269949 A074456 A016454 * A208539 A174128 A131070

Adjacent sequences: A065224 A065225 A065226 * A065228 A065229 A065230

Keyword

easy,nonn

Author

Floor van Lamoen, Oct 22 2001

Status

approved