|
|
A081679
|
|
a(n)=(6^n-5^n-4^n-3^n+4*2^n)/2.
|
|
1
|
|
|
1, 1, 1, 16, 199, 1756, 13231, 91876, 608959, 3922396, 24798511, 154802836, 957674719, 5885660236, 35993747791, 219289723396, 1332092132479, 8073205753276, 48838076777071, 295005107805556, 1779844007102239
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,4
|
|
COMMENTS
|
Inverse binomial transform of A081680
|
|
LINKS
|
|
|
FORMULA
|
G.f.: (1-19*x+136*x^2-429*x^3+498*x^4)/((1-2*x)*(1-3*x)*(1-4*x)*(1-5*x)*(1-6*x)). - Bruno Berselli, Dec 15 2010
|
|
MATHEMATICA
|
LinearRecurrence[{20, -155, 580, -1044, 720}, {1, 1, 1, 16, 199}, 40] (* Harvey P. Dale, Jan 20 2022 *)
|
|
CROSSREFS
|
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|