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Search: id:A060704
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| A060704 |
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Singular n X n matrices over GF(2). |
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+0
2
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| 1, 10, 344, 45376, 23555072, 48560766976, 399099960492032, 13098680304497852416, 1718239329196060706865152, 901210462928281273073900978176, 1890350559451566075272982533664407552
(list; graph; listen)
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OFFSET
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1,2
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COMMENT
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Also (apparently) number of n X n matrices over GF(2) having permanent = 0. - Hugo Pfoertner (hugo(AT) pfoertner.org), Nov 14 2003
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,57
Index entries for sequences related to binary matrices
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FORMULA
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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)
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MAPLE
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for n from 1 to 20 do printf(`%d, `, 2^(n^2) - product(2^n - 2^j, j=0..n-1)) od:
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PROGRAM
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(PARI) { for (n=1, 57, write("b060704.txt", n, " ", 2^(n^2) - prod(i=0, n-1, 2^n - 2^i)); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 09 2009]
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CROSSREFS
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Cf. A002884, A002416.
Sequence in context: A046747 A006426 A029698 this_sequence A132093 A016101 A112694
Adjacent sequences: A060701 A060702 A060703 this_sequence A060705 A060706 A060707
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KEYWORD
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nonn
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AUTHOR
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Ahmed Fares (ahmedfares(AT)my-deja.com), Apr 20 2001
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 23 2001
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