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A100644 Denominator of Cotesian number C(n,1). 0

%I

%S 2,3,8,45,96,35,17280,14175,89600,149688,29030400,79625,402361344000,

%T 312741000,229605376,488462349375,83691159552000,50697046400,

%U 8604790260498432,1470076286679,29967718809600000,4694524604733600000,269760174666625843200000,5699209469078125

%N Denominator of Cotesian number C(n,1).

%D Charles Jordan, Calculus of Finite Differences, Chelsea 1965, p. 513.

%e 1/2, 2/3, 3/8, 16/45, 25/96, 9/35, 3577/17280, 2944/14175, 15741/89600, 26575/149688, 4495513/29030400, 12504/79625, 56280729661/402361344000, 44436679/312741000, ... = A100623/A100624 = A002178/A002176 (the latter not being in lowest terms)

%Y See A002176 for further references. A diagonal of A100640/A100641.

%K nonn,frac

%O 1,1

%A _N. J. A. Sloane_, Dec 04 2004

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Last modified January 29 14:07 EST 2020. Contains 331338 sequences. (Running on oeis4.)