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A303863
Number of pairs (lambda,mu) of partitions lambda of 2n+1 and mu of n+1 with mu <= lambda (by diagram containment).
3
1, 4, 13, 42, 114, 313, 759, 1858, 4207, 9468, 20198, 42955, 87333, 176706, 346450, 673619, 1276936, 2404288, 4429895, 8105634, 14576610, 26017631, 45767924, 79970030, 137934105, 236375455, 400667547, 674818625, 1125626097, 1866565406, 3068368925, 5015847315
OFFSET
0,2
LINKS
Eric Weisstein's World of Mathematics, Ferrers Diagram
Wikipedia, Ferrers diagram
FORMULA
a(n) = A259478(2n+1,n+1) = A303852(2n+1).
CROSSREFS
Bisection (odd part) of A303852.
Cf. A259478.
Sequence in context: A121654 A186202 A036366 * A255836 A109454 A357063
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 01 2018
STATUS
approved