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Search: id:A060721
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| A060721 |
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Singular n X n matrices over GF(7). |
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+0
2
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| 1, 385, 6569479, 5421836400001, 218857429741036363207, 432771509734663800164593788001, 41931064368881878511703371604583698172807
(list; graph; listen)
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OFFSET
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1,2
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LINKS
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Harry J. Smith, Table of n, a(n) for n=1,...,34
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FORMULA
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For n >= 1 a(n) = 7^(n^2) - A053293(n) = 7^(n^2) - (7^n - 1)(7^n - 7)...(7^n - 7^(n-1))
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MAPLE
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for n from 1 to 15 do printf(`%d, `, 7^(n^2) - product(7^n-7^j, j=0..n-1)) od:
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PROGRAM
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(PARI) { for (n=1, 34, write("b060721.txt", n, " ", 7^(n^2) - prod(j=0, n - 1, 7^n - 7^j)); ) } [From Harry J. Smith (hjsmithh(AT)sbcglobal.net), Jul 10 2009]
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CROSSREFS
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A053293.
Sequence in context: A065110 A063390 A130612 this_sequence A116316 A116329 A038659
Adjacent sequences: A060718 A060719 A060720 this_sequence A060722 A060723 A060724
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KEYWORD
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nonn
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AUTHOR
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Avi Peretz (njk(AT)netvision.net.il), Apr 21 2001
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EXTENSIONS
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More terms from James A. Sellers (sellersj(AT)math.psu.edu), Apr 24 2001
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