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A100643 Numerator of Cotesian number C(n,1). 0
1, 2, 3, 16, 25, 9, 3577, 2944, 15741, 26575, 4495513, 12504, 56280729661, 44436679, 29505985, 63813303296, 10004122565473, 6162434073, 965843331633293, 167791152125, 3181977977743649, 506778072148248857, 27256898762578419475451, 585293809045696 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

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

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

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)

CROSSREFS

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

Sequence in context: A044905 A045877 A261840 * A067037 A117926 A185251

Adjacent sequences:  A100640 A100641 A100642 * A100644 A100645 A100646

KEYWORD

nonn,frac

AUTHOR

N. J. A. Sloane, Dec 04 2004

STATUS

approved

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Last modified November 19 03:48 EST 2019. Contains 329310 sequences. (Running on oeis4.)