A100643 Numerator of Cotesian number C(n,1).

1, 2, 3, 16, 25, 9, 3577, 2944, 15741, 26575, 4495513, 12504, 56280729661, 44436679, 29505985, 63813303296, 10004122565473, 6162434073, 965843331633293, 167791152125, 3181977977743649, 506778072148248857, 27256898762578419475451, 585293809045696

Offset: 1

Author

N. J. A. Sloane, Dec 04 2004

Keywords

• nonn
• frac

Examples

			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)
		

References

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

Crossrefs

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