|
| |
|
|
A293302
|
|
E.g.f.: Product_{m>0} 1/(1 - x^m + x^(2*m)/2!).
|
|
2
|
|
|
|
1, 1, 3, 12, 66, 450, 3510, 32760, 335160, 3832920, 48648600, 673596000, 9961736400, 161026866000, 2775402630000, 50713246584000, 987048958896000, 20331148966128000, 440625863806128000, 10057578887708352000, 240218186856167520000, 6010719623406257760000
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
|
OFFSET
|
0,3
|
|
|
LINKS
|
Seiichi Manyama, Table of n, a(n) for n = 0..444
|
|
|
MATHEMATICA
|
nmax = 25; CoefficientList[Series[1/Product[1 - x^k + x^(2*k)/2, {k, 1, nmax}], {x, 0, nmax}], x] * Range[0, nmax]! (* Vaclav Kotesovec, Oct 05 2017 *)
|
|
|
PROG
|
(PARI) x = 'x + O('x^40); Vec(serlaplace(prod(m=1, 40, 1/(1 - x^m + x^(2m)/2!)))) \\ Michel Marcus, Oct 05 2017
|
|
|
CROSSREFS
|
Column k=2 of A293301.
Sequence in context: A267323 A058790 A199746 * A248871 A080599 A349581
Adjacent sequences: A293299 A293300 A293301 * A293303 A293304 A293305
|
|
|
KEYWORD
|
nonn
|
|
|
AUTHOR
|
Seiichi Manyama, Oct 05 2017
|
|
|
STATUS
|
approved
|
| |
|
|
