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Search: id:A080252
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| A080252 |
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a(n)=na(n-1)+4a(n-2)-4(n-2)a(n-3). |
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+0
1
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| 0, 1, 2, 10, 40, 216, 1296, 9136, 73088, 658048, 6580480, 72386304, 868635648, 11292267520, 158091745280, 2371376195584, 37942019129344, 645014325264384, 11610257854758912, 220594899240681472, 4411897984813629440
(list; graph; listen)
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OFFSET
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0,3
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FORMULA
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E.g.f.: sinh(z)cosh(z)/(1-z)
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MATHEMATICA
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c = CoefficientList[Series[(Sinh[z]*Cosh[z])/(1 - z), {z, 0, 25}], z]; For[n = 0, n < 25, n++; Print[c[[n]]*(n - 1)! ]]
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CROSSREFS
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Sequence in context: A151026 A151027 A151028 this_sequence A127113 A051540 A125130
Adjacent sequences: A080249 A080250 A080251 this_sequence A080253 A080254 A080255
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KEYWORD
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easy,nonn
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AUTHOR
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Mario Catalani (mario.catalani(AT)unito.it), Feb 10 2003
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