|
Search: id:A156195
|
|
|
| A156195 |
|
a(2n+2)=6*a(2n+1), a(2n+1)=6*a(2n)-5^n*A000108(n), a(0)=1 . |
|
+0
6
|
|
| 1, 5, 30, 175, 1050, 6250, 37500, 224375, 1346250, 48412500, 290343750, 1742062500, 10450312500, 62701875000, 376177734375, 2257066406250, 13541839843750, 81251039062500, 487496738281250, 2924980429687500
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Hankel transform is 5^C(n+1,2). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Feb 05 2009]
|
|
FORMULA
|
a(n)=sum{k=0..n, A120730(n,k)*5^k}.
G.f.: (sqrt(1-20x^2)+10x-1)/(10x*(1-6x)). [From Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Feb 05 2009]
|
|
CROSSREFS
|
Cf. A000108, A156058, A001405, A151281, A151162, A151254
Sequence in context: A084158 A111469 A057088 this_sequence A105481 A094167 A051738
Adjacent sequences: A156192 A156193 A156194 this_sequence A156196 A156197 A156198
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Philippe DELEHAM (kolotoko(AT)wanadoo.fr), Feb 05 2009
|
|
|
Search completed in 0.002 seconds
|
