A127186 Number of nonsingular n X n real {0,1}-matrices such that all upper left i X i submatrices are singular for i = 1..n-1.

0, 2, 40, 584, 1695296

Offset

1,2

Links

Table of n, a(n) for n=1..5.

Crossrefs

Cf. A125587, A125593, A127182, A127183.

Sequence in context: A108033 A160229 A012807 * A139747 A230133 A279214

Adjacent sequences: A127183 A127184 A127185 * A127187 A127188 A127189

Keyword

nonn

Author

Artur Jasinski, Jan 08 2007

Status

approved