A119008 Number of n X n real symmetric (0,1)-matrices with determinant = 1.

1, 1, 4, 268, 9456, 301306, 24846368, 8946957244, 4175660906560, 2421067614753916

Offset

1,3

Links

Table of n, a(n) for n=1..10.

Crossrefs

Cf. A086264, A086899, A086900, A086906, A118998, A119002, A119009.

Sequence in context: A203839 A052136 A089667 * A357559 A108134 A221081

Adjacent sequences: A119005 A119006 A119007 * A119009 A119010 A119011

Keyword

nonn,more

Author

Giovanni Resta, May 08 2006

Extensions

a(8)-a(10) from Max Alekseyev, Jun 17 2025

Status

approved