|
Search: id:A105618
|
|
| |
|
| 1, 3, 15, 107, 991, 11203, 148879, 2270027, 39041151, 747704963, 15784630159, 364256650027, 9124264794271, 246600188525123, 7153677209063439, 221729176945261067, 7313478624348963391, 255786689421734222083
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
PROGRAM
|
(PARI) {a(n)=if(n<0, 0, sum(k=0, n, (matrix(n+1, n+1, m, j, if(m>=j, if(m==j, 1, if(m==j+1, -2*j, polcoeff(1/sum(i=0, m-j, (2*i)!/i!/2^i*x^i)+O(x^m), m-j)))))^-1)[n+1, k+1]))}
|
|
CROSSREFS
|
Cf. A105615.
Sequence in context: A107878 A120016 A074519 this_sequence A120732 A090351 A136221
Adjacent sequences: A105615 A105616 A105617 this_sequence A105619 A105620 A105621
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Paul D. Hanna (pauldhanna(AT)juno.com), Apr 16 2005
|
|
|
Search completed in 0.002 seconds
|
