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.

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

Author

R. J. Mathar, Mar 09 2017

Keywords

• nonn
• tabl

Examples

			Triangle begins:
2;
7,     16;
34,    265,      512;
209,   7343,     41503,      65536;
1546,  304186,   6474726,    24997921,    33554432;
13327, 17525812, 1709852332, 21252557377, 57366997447, 68719476736;
...
		

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..84

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).