A116527 - OEIS

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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.

4

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

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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