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Search: id:A002177
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| A002177 |
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Numerators of Cotesian numbers (not in lowest terms): A002176*C(n,0).
(Formerly M4364 N1829)
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+0
10
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| 1, 1, 1, 7, 19, 41, 751, 989, 2857, 16067, 2171465, 1364651, 8181904909, 90241897, 35310023, 15043611773, 55294720874657, 203732352169, 69028763155644023, 19470140241329, 1022779523247467, 396760150748100749
(list; graph; listen)
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OFFSET
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1,4
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REFERENCES
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W. W. Johnson, On Cotesian numbers: their history, computation, and values to n=20, Quart. J. Pure Appl. Math., 46 (1914), 52-65.
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PROGRAM
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(PARI) cn(n)= mattranspose(matinverseimage( matrix(n+1, n+1, k, m, (m-1)^(k-1)), matrix(n+1, 1, k, m, n^(k-1)/k)))[ 1, ] \\ vector of quadrature formula coefficients via matrix solution
(PARI) ncn(n)= denominator(cn(n))*cn(n); nk(n, k)= if(k<0|k>n, 0, ncn(n)[ k+1 ]); A002177(n)= nk(n, 0)
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CROSSREFS
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Cf. A100640/A100641, A100620/A100621, A002176-A002179.
Sequence in context: A097241 A067889 A100620 this_sequence A141193 A104163 A054690
Adjacent sequences: A002174 A002175 A002176 this_sequence A002178 A002179 A002180
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KEYWORD
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nonn,easy,nice
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AUTHOR
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njas
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EXTENSIONS
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More terms from Michael Somos
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