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A283500
Triangle read by rows: T(n,k) = number of n X n (0,1) matrices with at most k 1's in each row or column.
4
2, 7, 16, 34, 265, 512, 209, 7343, 41503, 65536, 1546, 304186, 6474726, 24997921, 33554432, 13327, 17525812, 1709852332, 21252557377, 57366997447, 68719476736, 130922, 1336221251, 702998475376, 34215495252681, 252540841305558, 505874809287625
OFFSET
1,1
LINKS
EXAMPLE
Triangle begins:
2;
7, 16;
34, 265, 512;
209, 7343, 41503, 65536;
1546, 304186, 6474726, 24997921, 33554432;
13327, 17525812, 1709852332, 21252557377, 57366997447, 68719476736;
...
CROSSREFS
Cf. A002720 (column k=1), A197458 (column k=2), A008300 (exactly k 1s).
Main diagonal and first lower diagonal give: A002416, A048291.
Cf. A247158 (k=n/2).
Sequence in context: A192952 A132738 A259966 * A097442 A345025 A329324
KEYWORD
nonn,tabl
AUTHOR
R. J. Mathar, Mar 09 2017
STATUS
approved