A047690 Denominators of coefficients in Taylor series for exp(cos(x)-1).

1, 2, 6, 720, 40320, 907200, 479001600, 87178291200, 5230697472000, 6402373705728000, 221172909834240000, 281000181944401920000, 620448401733239439360000, 403291461126605635584000000, 76222086152928465125376000000, 24113896346562823512391680000000

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• 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. A047689, A005046.

Cf. A097322.