|
Search: id:A081912
|
|
| |
|
| 1, 6, 37, 234, 1512, 9936, 66096, 443232, 2985984, 20155392, 136048896, 917070336, 6167549952, 41358864384, 276451356672, 1841557856256, 12224809598976, 80871817347072, 533189772509184, 3503818505060352, 22952550207062016
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
Binomial transform of A081911 6th binomial transform of (1,0,1,0,0,0,......). Case k=6 where a(n,k)=k^n(n^2-n+2k^2)/(2k^2) with G.f. (1-2kx+(k^2+1)x^2)/(1-kx)^3.
|
|
FORMULA
|
a(n)=6^n(n^2-n+72)/72 G.f. (1-12x+37x^2)/(1-6x)^3
|
|
CROSSREFS
|
Adjacent sequences: A081909 A081910 A081911 this_sequence A081913 A081914 A081915
Sequence in context: A076026 A081570 A122898 this_sequence A081188 A005389 A080954
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), Mar 31 2003
|
|
|
Search completed in 0.002 seconds
|
