|
Search: id:A134089
|
|
|
| A134089 |
|
a(n) = [x^n] G(x)^(2^(n+1))/2^n where G(x) satisfies: [x^(n+1)] G(x)^(2^n) = [x^n] G(x)^(2^n) for n>=0 and G(2x) is the g.f. of A134084. |
|
+0
6
|
|
| 1, 2, 8, 84, 2676, 275700, 94775156, 111378681460, 457034829332596, 6660551038769802356, 349287637698829559108724, 66597190541338218944629998708, 46556095585511177615107782087451764
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
FORMULA
|
a(n) = A134087(n)/2^n.
|
|
PROGRAM
|
(PARI) {a(n)=local(A=[1], B); for(i=1, n, A=concat(A, 0); B=Vec(Ser(A)^(2^(#A-2))); A[ #A]=(B[ #B-1]-B[ #B])/2^(#A-2)); Vec(Ser(A)^(2^(n+1)))[n+1]/2^n}
|
|
CROSSREFS
|
Cf. A134084, A134085, A134086, A134087, A134088.
Sequence in context: A134086 A013175 A120820 this_sequence A136647 A052456 A000532
Adjacent sequences: A134086 A134087 A134088 this_sequence A134090 A134091 A134092
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Paul D. Hanna (pauldhanna(AT)juno.com), Oct 26 2007
|
|
|
Search completed in 0.002 seconds
|
