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A281586 E.g.f.: z*(((exp(z)+1)/((exp(z)+2*exp(-z/2)*cos(z*sqrt(3)/2))/3))-1). 0
0, 1, 2, 3, -4, -15, -54, 133, 792, 4293, -15130, -123849, -895212, 4101799, 42732522, 386103915, -2177360656, -27544520691, -298649804706, 1999963458217, 29765143177020, 376514568163377, -2919514870785766, -49968285360277437, -722370834074695896, 6365117686550339275 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
MAPLE
A281586_list := proc(len) z*(((exp(z)+1)/((exp(z)+2*exp(-z/2)* cos(z*sqrt(3)/2))/3))-1); series(%, z, len+1); seq(k!*coeff(%, z, k), k=0..len) end: A281586_list(20);
PROG
(Sage) # uses[SIB from A281588]
A281586_list = lambda len: SIB(len, 3)
print(A281586_list(26))
CROSSREFS
a(n) = A215064(n,1).
Sequence in context: A005645 A362639 A348628 * A365739 A217714 A076965
KEYWORD
sign
AUTHOR
Peter Luschny, Jan 25 2017
STATUS
approved

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Last modified March 28 07:48 EDT 2024. Contains 371235 sequences. (Running on oeis4.)