login
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
OFFSET
0,3
REFERENCES
N. G. de Bruijn, Asymptotic Methods in Analysis, North-Holland, 3rd. ed., 1970; see p. 158, (8.6.4).
LINKS
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
KEYWORD
nonn,easy,frac
AUTHOR
N. J. A. Sloane, Jan 21 2001
STATUS
approved