|
|
A074507
|
|
a(n) = 1^n + 3^n + 5^n.
|
|
5
|
|
|
3, 9, 35, 153, 707, 3369, 16355, 80313, 397187, 1972809, 9824675, 49005273, 244672067, 1222297449, 6108298595, 30531927033, 152630937347, 763068593289, 3815084686115, 19074648589593, 95370918425027, 476847618556329
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,1
|
|
LINKS
|
|
|
FORMULA
|
a(n) = 8*a(n-1) - 15*a(n-2) + 8.
G.f.: 1/(1-x)+1/(1-3*x)+1/(1-5*x). E.g.f.: e^x+e^(3*x)+e^(5*x). [Mohammad K. Azarian, Dec 26 2008]
|
|
MATHEMATICA
|
Table[1^n + 3^n + 5^n, {n, 0, 22}]
LinearRecurrence[{9, -23, 15}, {3, 9, 35}, 30] (* Harvey P. Dale, Mar 02 2022 *)
|
|
PROG
|
|
|
CROSSREFS
|
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|