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A256402
Denominators of coefficients of expansion of exp(-Sum_{k=0..oo} x^(2^k)/2^k ) in powers of x.
3
1, 1, 1, 3, 3, 5, 45, 63, 105, 405, 14175, 17325, 18711, 552825, 14189175, 49116375, 91216125, 144729585, 97692469875, 109185701625, 1031198293125, 10257709336875, 3430178002251, 2348038513445625, 1034450533895625, 160789593855515625, 16025362854266390625
OFFSET
0,4
LINKS
Koda, Tatsuhiko; Sato, Masaki; Takegahara, Yugen; 2-adic properties for the numbers of involutions in the alternating groups, J. Algebra Appl. 14 (2015), no. 4, 1550052 (21 pages). See Lemma 2.1.
CROSSREFS
For numerators see A256401. Cf. A256400.
Sequence in context: A110426 A200562 A093310 * A170919 A364661 A280779
KEYWORD
nonn,frac
AUTHOR
N. J. A. Sloane, Mar 29 2015
EXTENSIONS
a(18)-a(26) from Hiroaki Yamanouchi, Mar 30 2015
STATUS
approved