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A059240 Denominators of coefficients of asymptotic expansion related to iterated sine function. 2
1, 1, 5, 7, 25, 385, 79625, 1925, 14889875, 116491375, 4094715625, 32534376875, 49558343209375, 2505147019375, 118055053288046875, 13604013002689484375, 70242756706387890625, 25617946563506171875, 1532331197299213611691015625, 167669460258147894921875 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

REFERENCES

N. G. de Bruijn, Asymptotic Methods in Analysis, North-Holland, 3rd. ed., 1970; see p. 158, (8.6.4).

LINKS

G. C. Greubel, Table of n, a(n) for n = 0..275

FORMULA

a(n) = denominator ( (1-2*n)*(-12)^n*Bernoulli(2*n)/(2*n)! ).

MAPLE

a:= n-> denom((1-2*n)*(-12)^n*bernoulli(2*n)/(2*n)!): seq (a(n), n=0..30);

MATHEMATICA

Denominator[Table[(1-2n)(-12)^n BernoulliB[2n]/(2n)!, {n, 0, 30}]] (* Harvey P. Dale, Nov 06 2011 *)

CROSSREFS

Cf. A059239.

Sequence in context: A179782 A013626 A067701 * A324363 A166100 A135606

Adjacent sequences:  A059237 A059238 A059239 * A059241 A059242 A059243

KEYWORD

nonn,easy,frac

AUTHOR

N. J. A. Sloane, Jan 21 2001

STATUS

approved

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Last modified July 21 04:40 EDT 2019. Contains 325189 sequences. (Running on oeis4.)