|
| |
|
|
A160852
|
|
Chebyshev transform of A107841.
|
|
0
| |
|
|
1, 2, 11, 66, 461, 3448, 27061, 219702, 1829851, 15547142, 134224361, 1174119120, 10383783641, 92691197962, 834047700091, 7557110252538, 68890745834341, 631392034936040, 5814520777199261, 53776065007163886, 499275423496447211
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
FORMULA
| G.f.: (1+x-x^2-sqrt(1-10x-x^2+10x^3+x^4))/(6x(1-x^2));
G.f.: 1/(1-2x-x^2-6x^2/(1-5x-x^2-6x^2/(1-5x-x^2-6x^2/(1-5-x^2-6x^2/(1-... (continued fraction).
a(n)=sum{k=0..floor(n/2), C(n-k,k)*A107841(n-2k)}.
|
|
|
MATHEMATICA
| CoefficientList[Series[(1+x-x^2-Sqrt[1-10x-x^2+10x^3+x^4])/(6x(1-x^2)), {x, 0, 20}], x] (* From Harvey P. Dale, Aug 12 2011 *)
|
|
|
CROSSREFS
| Sequence in context: A074613 A039632 A143816 * A185627 A138792 A058056
Adjacent sequences: A160849 A160850 A160851 * A160853 A160854 A160855
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Paul Barry (pbarry(AT)wit.ie), May 28 2009
|
| |
|
|
