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A333740
Number of inequivalent 2n X 2n binary matrices with rows and columns summing to n, where equivalence means permutations of rows or columns.
1
1, 1, 2, 7, 194, 601055, 294494683312, 14584161564179926207, 80055722734531008786502722278, 53505113579082591021525466231199449015539
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OFFSET
0,3
LINKS
Table of n, a(n) for n=0..9.
Index entries for sequences related to binary matrices
Index to number of inequivalent matrices modulo permutation of rows and columns
FORMULA
a(n) = A133687(2n,n).
CROSSREFS
Cf. A133687.
Sequence in context: A307582 A125610 A247028 * A306951 A181864 A096463
Adjacent sequences: A333737 A333738 A333739 * A333741 A333742 A333743
KEYWORD
nonn,more
AUTHOR
Alois P. Heinz, Apr 03 2020
STATUS
approved

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Last modified September 29 21:11 EDT 2024. Contains 376324 sequences.
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