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A172558
Number of 2*n X 12 binary arrays with row sums 6 and column sums n.
3
1, 924, 32496156, 3718394156400, 729833528645228700, 195428754450309450171024, 64051375889927380035549804336, 24197157773366540262083203214418624, 10156485647319165206190655366818708639900, 4623755659802671553551698062433487687144266000, 2245303346871705713053772485416749032101579706759056
OFFSET
0,2
LINKS
Christoph Koutschan, Table of n, a(n) for n = 0..39 (terms n=1..19 from R. H. Hardin)
Robert Dougherty-Bliss, Christoph Koutschan, Natalya Ter-Saakov, and Doron Zeilberger, The (Symbolic and Numeric) Computational Challenges of Counting 0-1 Balanced Matrices, arXiv:2410.07435 [math.CO], 2024.
CROSSREFS
Column k=6 of A376935.
Sequence in context: A177305 A177306 A248814 * A229778 A172657 A172761
KEYWORD
nonn
AUTHOR
R. H. Hardin, Feb 06 2010
EXTENSIONS
a(0)=1 prepended by Christoph Koutschan, Oct 12 2024
STATUS
approved