A047689 Numerators of coefficients in Taylor series for exp(cos(x)-1).

1, -1, 1, -31, 379, -1639, 150349, -4373461, 39074491, -6698486371, 30708135509, -4934550701809, 1319703681935929, -99896787342523081, 2121075416425574701, -72929243565543262421, 83877585692383961052499, -2410048463569672917849859

Offset: 0

Author

N. J. A. Sloane

Keywords

• sign
• easy
• frac

Examples

			1 - (1/2)*x^2 + (1/6)*x^4 - (31/720)*x^6 + (379/40320)*x^8 - (1639/907200)*x^10 + ...
		

References

• CRC Standard Mathematical Tables and Formulae, 30th ed. 1996, p. 42.

Crossrefs

Cf. A047690, A005046.