

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
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OFFSET

0,8


LINKS

Hiroaki Yamanouchi, Table of n, a(n) for n = 0..100
Koda, Tatsuhiko; Sato, Masaki; Takegahara, Yugen; 2adic 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: A073930 A130223 A126750 * A109292 A275571 A192379
Adjacent sequences: A256398 A256399 A256400 * A256402 A256403 A256404


KEYWORD

sign,frac


AUTHOR

N. J. A. Sloane, Mar 29 2015


EXTENSIONS

a(18)a(27) from Hiroaki Yamanouchi, Mar 30 2015


STATUS

approved



