|
Search: id:A102921
|
|
| |
|
| 1, 3, 36, 1036, 56355, 5045370, 679409158, 129195427716, 33114233390505, 11038606786054201, 4652371578279864792, 2423023045813285312020, 1530233703568825263174101, 1153422053136775523883308988
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Equals the bisection of A102917. Triangle A102098 shifts each column up 1 row under matrix cube.
|
|
PROGRAM
|
(PARI) {a(n)=if(n==0, 2, polcoeff(2-sum(k=0, n-1, a(k)*x^k*prod(j=2, k\2+2, 1-j*x +x*O(x^n))), n))} /* at even-indices n=0, 2, 4, .. */
|
|
CROSSREFS
|
Cf. A102920, A102098, A102917.
Sequence in context: A004824 A132912 A126447 this_sequence A102579 A136393 A158093
Adjacent sequences: A102918 A102919 A102920 this_sequence A102922 A102923 A102924
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Paul D. Hanna (pauldhanna(AT)juno.com), Jan 21 2005
|
|
|
Search completed in 0.002 seconds
|
