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A303861
Number of pairs (lambda,mu) of partitions lambda of 2n and mu of n with mu <= lambda (by diagram containment).
4
1, 2, 8, 23, 70, 178, 479, 1119, 2687, 5960, 13203, 27728, 58293, 117084, 234579, 455637, 878603, 1652382, 3089769, 5654741, 10284636, 18389288, 32649594, 57145095, 99386432, 170658713, 291240275, 491704106, 825049784, 1371281674, 2266239384, 3713251732
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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,n) = A303851(2n) = A303852(2n).
CROSSREFS
Bisection (even part) of A303851 and of A303852.
Cf. A259478.
Sequence in context: A018042 A304304 A072842 * A138387 A374364 A354176
Adjacent sequences: A303858 A303859 A303860 * A303862 A303863 A303864
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 01 2018
STATUS
approved

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Last modified November 6 15:15 EST 2024. Contains 377513 sequences.
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