|
|
A261048
|
|
Second column of the triangle A085843.
|
|
1
|
|
|
1, 4, 16, 67, 294, 1346, 6397, 31405, 158531, 819438, 4321316, 23176629, 126086986, 694259790, 3862070512, 21673114457, 122545849017, 697461040394, 3992357941495, 22968483183300, 132734108621190, 770146656686400, 4484664208897710, 26200077885755587
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
1,2
|
|
LINKS
|
|
|
FORMULA
|
2*n *(8*n-77) *(2*n+3) *(n+1)*a(n) +n*(32*n^3 +7345*n^2 -4387*n -4370)*a(n-1) +2*(-2421*n^4 -27323*n^3 +119441*n^2 -126867*n +34410)*a(n-2) +4*(2*n-5) *(3626*n^3 +23472*n^2 -131091*n +126798)*a(n-3) -200*(n-3) *(61*n+547) *(2*n-5) *(2*n-7)*a(n-4)=0. - R. J. Mathar, Aug 08 2015
|
|
CROSSREFS
|
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|