|
Search: id:A135574
|
|
| |
|
| 0, 0, 3, 1, 11, 6, 42, 21, 171, 85, 683, 342, 2730, 1365, 10923, 5461, 43691, 21846, 174762, 87381, 699051, 349525, 2796203, 1398102, 11184810, 5592405, 44739243, 22369621, 178956971, 89478486, 715827882, 357913941, 2863311531, 1431655765
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
FORMULA
|
a(n+1)-2a(n) = A135575(n).
O.g.f.: -x^2*(3+2*x^2+x+3*x^3)/[(2*x-1)(x^2-x+1)(2*x+1)(x^2+x+1)] . - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 31 2008
|
|
MAPLE
|
A024495 := proc(n) option remember ; if n <=1 then 0; elif n = 2 then 1; else 3*procname(n-1)-3*procname(n-2)+2*procname(n-3) ; fi; end: A135574 := proc(n) option remember ; if n mod 2 = 0 then A024495(n+1) ; else A024495(n-1) ; fi; end: seq(A135574(n), n=0..40) ; [From R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009]
|
|
CROSSREFS
|
Sequence in context: A110165 A111965 A110440 this_sequence A008969 A119908 A153257
Adjacent sequences: A135571 A135572 A135573 this_sequence A135575 A135576 A135577
|
|
KEYWORD
|
nonn,easy
|
|
AUTHOR
|
Paul Curtz (bpcrtz(AT)free.fr), Feb 24 2008
|
|
EXTENSIONS
|
More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Mar 31 2008
More terms from R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Feb 07 2009
|
|
|
Search completed in 0.002 seconds
|
