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A303862 Number of pairs (lambda,mu) of partitions lambda of 2n+1 and mu of n with mu <= lambda (by diagram containment). 3
1, 3, 12, 35, 105, 262, 690, 1590, 3756, 8221, 17994, 37363, 77767, 154747, 307400, 592377, 1134126, 2118344, 3936532, 7161970, 12955028, 23043927, 40717240, 70937194, 122845251, 210072976, 357119309, 600696846, 1004415874, 1663790776, 2740918749, 4477271509 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..100

Eric Weisstein's World of Mathematics, Ferrers Diagram

Wikipedia, Ferrers diagram

FORMULA

a(n) = A259478(2n+1,n) = A303851(2n+1).

CROSSREFS

Bisection (odd part) of A303851.

Cf. A259478.

Sequence in context: A295363 A097339 A260006 * A320346 A305542 A232899

Adjacent sequences:  A303859 A303860 A303861 * A303863 A303864 A303865

KEYWORD

nonn

AUTHOR

Alois P. Heinz, May 01 2018

STATUS

approved

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Last modified September 30 00:37 EDT 2020. Contains 337432 sequences. (Running on oeis4.)