1,2

Also (apparently) number of n X n matrices over GF(2) having permanent = 0. - Hugo Pfoertner (hugo(AT) pfoertner.org), Nov 14 2003

Index entries for sequences related to binary matrices

For n >= 1 a(n) = 2^(n^2) - A002884(n) = A002416(n) - A002884(n) = 2^(n^2) - product(2^n-2^i, i=0..n-1)

for n from 1 to 20 do printf(`%d, `, 2^(n^2) - product(2^n - 2^j, j=0..n-1)) od:

Cf. A002884, A002416.

Sequence in context: A046747 A006426 A029698 this_sequence A132093 A016101 A112694

Adjacent sequences: A060701 A060702 A060703 this_sequence A060705 A060706 A060707

nonn

Ahmed Fares (ahmedfares(AT)my-deja.com), Apr 20 2001

More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 23 2001