|
Search: id:A080252
|
|
|
| A080252 |
|
a(n)=na(n-1)+4a(n-2)-4(n-2)a(n-3). |
|
+0
1
|
|
| 0, 1, 2, 10, 40, 216, 1296, 9136, 73088, 658048, 6580480, 72386304, 868635648, 11292267520, 158091745280, 2371376195584, 37942019129344, 645014325264384, 11610257854758912, 220594899240681472, 4411897984813629440
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
FORMULA
|
E.g.f.: sinh(z)cosh(z)/(1-z)
|
|
MATHEMATICA
|
c = CoefficientList[Series[(Sinh[z]*Cosh[z])/(1 - z), {z, 0, 25}], z]; For[n = 0, n < 25, n++; Print[c[[n]]*(n - 1)! ]]
|
|
CROSSREFS
|
Adjacent sequences: A080249 A080250 A080251 this_sequence A080253 A080254 A080255
Sequence in context: A009338 A052978 A030534 this_sequence A127113 A051540 A125130
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Mario Catalani (mario.catalani(AT)unito.it), Feb 10 2003
|
|
|
Search completed in 0.002 seconds
|
