|
Search: id:A083425
|
|
| |
|
| 1, 4, 21, 104, 521, 2604, 13021, 65104, 325521, 1627604, 8138021, 40690104, 203450521, 1017252604, 5086263021, 25431315104, 127156575521, 635782877604, 3178914388021, 15894571940104, 79472859700521, 397364298502604
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Binomial transform of A083424 Inverse binomial transform of A052934
|
|
FORMULA
|
a(n)=(5*5^n+(-1)^n)/6 G.f. 1/((1-x)(1+4x)) E.g.f. (5exp(5x)+exp(-x))/6
a(n)=sum{k=0..n, binomial(n-k, k)4^(n-2k)5^k} - Paul Barry (pbarry(AT)wit.ie), Jul 29 2004
a(n)=A015531(n+1). [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 17 2008]
|
|
CROSSREFS
|
Sequence in context: A113022 A014986 A015531 this_sequence A100237 A117381 A010908
Adjacent sequences: A083422 A083423 A083424 this_sequence A083426 A083427 A083428
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), Apr 30 2003
|
|
|
Search completed in 0.002 seconds
|
