|
Search: id:A142586
|
|
| |
|
| 1, 2, 5, 14, 39, 107, 290, 779, 2079, 5522, 14615, 38579, 101634, 267347, 702455, 1844114, 4838079, 12686507, 33254210, 87141659, 228301839, 598026002, 1566300455, 4101923939, 10741568514, 28126975907, 73647747815, 192833044754, 504884940879, 1321888886747
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
The second term in the k-th iterated differences is 2, 3, 6, 10, 17, 28, 46, ... =A001610(k+1).
|
|
FORMULA
|
G.f.: (1-3x+2x^2+x^3)/((1-3x+x^2)(1-2x)). a(n)=A005248(n)-2^(n-1), n>0. - R. J. Mathar, Sep 22 2008
|
|
CROSSREFS
|
Sequence in context: A001011 A148315 A141752 this_sequence A132834 A000641 A026135
Adjacent sequences: A142583 A142584 A142585 this_sequence A142587 A142588 A142589
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Paul Curtz (bpcrtz(AT)free.fr), Sep 21 2008
|
|
EXTENSIONS
|
Edited and extended by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 22 2008
|
|
|
Search completed in 0.002 seconds
|
