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A065224 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 octagonal numbers. The final elements of the rows form a(n). 2
1, 2, 5, 1, 6, 12, 19, 6, 15, 25, 36, 8, 21, 35, 50, 1, 18, 36, 55, 75, 96, 22, 45, 69, 94, 120, 14, 42, 71, 101, 132, 164, 21, 55, 90, 126, 163, 201, 15, 55, 96, 138, 181, 225, 270, 36, 83, 131, 180, 230, 281, 333, 45, 99, 154, 210, 267, 325, 384, 36, 97, 159, 222 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..62.

CROSSREFS

Cf. A064766, A064865, A065221-A065223, A065225-A065234.

Sequence in context: A238387 A084245 A174232 * A325137 A321966 A304822

Adjacent sequences:  A065221 A065222 A065223 * A065225 A065226 A065227

KEYWORD

easy,nonn

AUTHOR

Floor van Lamoen, Oct 22 2001

STATUS

approved

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Last modified June 17 05:41 EDT 2021. Contains 345080 sequences. (Running on oeis4.)