A047692 Denominators of coefficients in Taylor series for exp(tan(x)).

1, 1, 2, 2, 8, 120, 240, 720, 5760, 362880, 3628800, 57600, 691200, 6227020800, 830269440, 261534873600, 20922789888000, 355687428096000, 914624815104000, 426824913715200, 4742499041280000, 51090942171709440000, 3784514234941440000

Offset: 0

Author

N. J. A. Sloane

Keywords

• nonn
• easy
• frac

Examples

			1 + 1*x + (1/2)*x^2 + (1/2)*x^3 + (3/8)*x^4 + (37/120)*x^5 + (59/240)*x^6 + (137/720)*x^7 + (871/5760)*x^8 + ...
		

References

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

Crossrefs

Cf. A047691, A006229.