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A047692 Denominators of coefficients in Taylor series for exp(tan(x)). 3
1, 1, 2, 2, 8, 120, 240, 720, 5760, 362880, 3628800, 57600, 691200, 6227020800, 830269440, 261534873600, 20922789888000, 355687428096000, 914624815104000, 426824913715200, 4742499041280000, 51090942171709440000, 3784514234941440000 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

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

LINKS

Table of n, a(n) for n=0..22.

EXAMPLE

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+...

CROSSREFS

Cf. A047691, A006229.

Sequence in context: A303060 A270555 A270405 * A270316 A069561 A180370

Adjacent sequences:  A047689 A047690 A047691 * A047693 A047694 A047695

KEYWORD

nonn,easy,frac

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified November 21 11:01 EST 2018. Contains 317447 sequences. (Running on oeis4.)