|
| |
|
|
A038249
|
|
Third line of 4-wave sequence A038197.
|
|
0
| |
|
|
1, 2, 9, 19, 75, 160, 622, 1329, 5157, 11021, 42756, 91376, 354484, 757588, 2938977, 6281058, 24366645, 52075371, 202020427, 431749580, 1674922950, 3579575053, 13886550633, 29677753369, 115131438424, 246054079584, 954538564968
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
LINKS
| F. v. Lamoen, Wave sequences
|
|
|
FORMULA
| G.f.: (-x^3-x^2+2*x+1) / (x^8-7*x^6+15*x^4-10*x^2+1). [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Jul 16 2009]
|
|
|
MAPLE
| a:= n-> (Matrix([[ `if` (irem(n, 2)=0, 1, 2), 0, 0, 1]]). Matrix(4, (i, j)-> if i=j-1 then 1 elif j=1 then [10, -15, 7, -1][i] else 0 fi) ^iquo(n, 2))[1, 1]: seq (a(n), n=0..30); [From Alois P. Heinz (heinz(AT)hs-heilbronn.de), Jul 16 2009]
|
|
|
CROSSREFS
| Sequence in context: A173663 A135207 A026541 * A116014 A090939 A077338
Adjacent sequences: A038246 A038247 A038248 * A038250 A038251 A038252
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Floor van Lamoen (fvlamoen(AT)hotmail.com)
|
|
|
EXTENSIONS
| More terms from Alois P. Heinz (heinz(AT)hs-heilbronn.de), Jul 16 2009
|
| |
|
|
