A116527 Number of singular n X n rational {0,1}-matrices with no zero rows or columns and with all rows distinct and all columns distinct, up to permutation of rows.

0, 0, 0, 75, 22365, 13303500, 21058940420, 98692672142610

Offset

1,4

Links

Table of n, a(n) for n=1..8.

Formula

a(n) = A094000(n) - A088389(n).

Conjecture: a(n) = A000410(n) - A000409(n-1) for n>1. - Jean-François Alcover, Jan 08 2020

Crossrefs

Cf. A000409, A000410, A116506, A116507, A116532.

Sequence in context: A093275 A251242 A259464 * A263064 A085404 A110100

Adjacent sequences: A116524 A116525 A116526 * A116528 A116529 A116530

Keyword

more,nonn

Author

Vladeta Jovovic, Apr 03 2006

Status

approved