

A060704


Singular n X n matrices over GF(2).


2



1, 10, 344, 45376, 23555072, 48560766976, 399099960492032, 13098680304497852416, 1718239329196060706865152, 901210462928281273073900978176, 1890350559451566075272982533664407552
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OFFSET

1,2


COMMENTS

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


LINKS

Harry J. Smith, Table of n, a(n) for n = 1..57
Index entries for sequences related to binary matrices


FORMULA

For n >= 1 a(n) = 2^(n^2)  A002884(n) = A002416(n)  A002884(n) = 2^(n^2)  Product_{i=0..n1} (2^n  2^i).


MAPLE

for n from 1 to 20 do printf(`%d, `, 2^(n^2)  product(2^n  2^j, j=0..n1)) od:


PROG

(PARI) a(n)={2^(n^2)  prod(i=0, n1, 2^n  2^i)} \\ Harry J. Smith, Jul 09 2009


CROSSREFS

Cf. A002884, A002416.
Sequence in context: A217506 A197769 A171583 * A220185 A132093 A217507
Adjacent sequences: A060701 A060702 A060703 * A060705 A060706 A060707


KEYWORD

nonn


AUTHOR

Ahmed Fares (ahmedfares(AT)mydeja.com), Apr 20 2001


EXTENSIONS

More terms from James A. Sellers, Apr 23 2001


STATUS

approved



