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Search: id:A069920
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| A069920 |
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Noninvertible n X n matrices mod 6 (i.e. over the ring Z_6). |
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+0
1
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| 4, 1008, 8190720, 2332005728256, 23674927650073214976, 8618480376852061696039059456, 112746432609478969278312620164116381696, 53053593891934168169788522401776516627950360068096
(list; graph; listen)
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OFFSET
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1,1
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FORMULA
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a(n) = 6^(n^2) - A065498(n)
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PROGRAM
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(PARI) for(n=1, 10, print1(6^(n^2)*(1-prod(k=1, n, (1-1/2^k)*(1-1/3^k))), ", "))
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CROSSREFS
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Cf. A065498, A069580.
Sequence in context: A006030 A087365 A024059 this_sequence A013780 A139300 A004804
Adjacent sequences: A069917 A069918 A069919 this_sequence A069921 A069922 A069923
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KEYWORD
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nonn
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AUTHOR
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Sharon Sela (sharonsela(AT)hotmail.com), May 05 2002
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EXTENSIONS
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More terms from Benoit Cloitre (benoit7848c(AT)orange.fr), May 11 2002
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