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A256401
Numerators of coefficients of expansion of exp(-Sum_{k=0..oo} x^(2^k)/2^k ) in powers of x.
3
1, -1, 0, 1, -1, 1, 1, -5, -8, 43, -74, -559, 697, -13232, -30727, 450991, -5519014, 8250311, 59081053, -2113948301, 19352683736, -113555728681, -4421555920, 10403170713454, 4947541575776, -1037548987977353, 4668788227294924, 20521746955820009
OFFSET
0,8
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 denominators see A256402. Cf. A256400.
Sequence in context: A342021 A130223 A126750 * A109292 A275571 A192379
KEYWORD
sign,frac
AUTHOR
N. J. A. Sloane, Mar 29 2015
EXTENSIONS
a(18)-a(27) from Hiroaki Yamanouchi, Mar 30 2015
STATUS
approved