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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). 2
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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

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

CROSSREFS

Cf. A064766, A064865, A065221-A065228, A065230-A065223.

Sequence in context: A228781 A103327 A177463 * A233037 A275999 A286910

Adjacent sequences:  A065226 A065227 A065228 * A065230 A065231 A065232

KEYWORD

easy,nonn

AUTHOR

Floor van Lamoen, Oct 22 2001

STATUS

approved

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Last modified February 20 14:32 EST 2020. Contains 332078 sequences. (Running on oeis4.)