A256400 -id:A256400 - cp's OEIS frontend

A256401 Numerators of coefficients of expansion of exp(-Sum_{k=0..oo} x^(2^k)/2^k ) in powers of x.

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

N. J. A. Sloane, Mar 29 2015

Hiroaki Yamanouchi, Table of n, a(n) for n = 0..100
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.

For denominators see A256402. Cf. A256400.

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

A256402 Denominators of coefficients of expansion of exp(-Sum_{k=0..oo} x^(2^k)/2^k ) in powers of x.

Original entry on oeis.org

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

N. J. A. Sloane, Mar 29 2015

Hiroaki Yamanouchi, Table of n, a(n) for n = 0..100
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.

For numerators see A256401. Cf. A256400.

a(18)-a(26) from Hiroaki Yamanouchi, Mar 30 2015

cp's OEIS Frontend

A256401 Numerators of coefficients of expansion of exp(-Sum_{k=0..oo} x^(2^k)/2^k ) in powers of x.

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