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Numerators of coefficients of expansion of exp(-Sum_{k=0..oo} x^(2^k)/2^k ) in powers of x.
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%I #13 Mar 30 2015 09:42:05

%S 1,-1,0,1,-1,1,1,-5,-8,43,-74,-559,697,-13232,-30727,450991,-5519014,

%T 8250311,59081053,-2113948301,19352683736,-113555728681,-4421555920,

%U 10403170713454,4947541575776,-1037548987977353,4668788227294924,20521746955820009

%N Numerators of coefficients of expansion of exp(-Sum_{k=0..oo} x^(2^k)/2^k ) in powers of x.

%H Hiroaki Yamanouchi, <a href="/A256401/b256401.txt">Table of n, a(n) for n = 0..100</a>

%H Koda, Tatsuhiko; Sato, Masaki; Takegahara, Yugen; <a href="http://dx.doi.org/10.1142/S0219498815500528">2-adic properties for the numbers of involutions in the alternating groups</a>, J. Algebra Appl. 14 (2015), no. 4, 1550052 (21 pages). See Lemma 2.1.

%Y For denominators see A256402. Cf. A256400.

%K sign,frac

%O 0,8

%A _N. J. A. Sloane_, Mar 29 2015

%E a(18)-a(27) from _Hiroaki Yamanouchi_, Mar 30 2015