login
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
OFFSET
0,2
LINKS
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
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 01 2018
STATUS
approved