A119010 Number of symmetric n X n (+1,-1)-matrices over the reals with zero permanent.

0, 4, 0, 192, 8960, 371200, 0

Offset

1,2

Links

Table of n, a(n) for n=1..7.

Crossrefs

Cf. A086906, A088672, A118990, A118993.

Sequence in context: A298447 A138734 A265596 * A255018 A176050 A099841

Adjacent sequences: A119007 A119008 A119009 * A119011 A119012 A119013

Keyword

nonn,more

Author

Giovanni Resta, May 08 2006

Status

approved