login
A065229
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 pentagonal numbers. The first elements of the rows form a(n).
0
1, 1, 3, 1, 5, 10, 4, 11, 19, 6, 16, 27, 4, 17, 31, 46, 11, 28, 46, 65, 15, 36, 58, 81, 13, 38, 64, 91, 2, 31, 61, 92, 124, 12, 46, 81, 117, 154, 16, 55, 95, 136, 178, 11, 55, 100, 146, 193, 241, 43, 93, 144, 196, 249, 16, 71, 127, 184, 242, 301, 31, 92, 154, 217, 281, 346
OFFSET
0,3
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: A228781 A103327 A177463 * A233037 A376726 A275999
KEYWORD
easy,nonn,changed
AUTHOR
Floor van Lamoen, Oct 22 2001
STATUS
approved