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A074616 a(n) = 5^n + 7^n. 9
2, 12, 74, 468, 3026, 19932, 133274, 901668, 6155426, 42306732, 292240874, 2026154868, 14085427826, 98109713532, 684326588474, 4778079088068, 33385518460226, 233393453440332, 1632228295176074, 11417968671701268 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
From Mohammad K. Azarian, Jan 11 2009: (Start)
G.f.: 1/(1-5*x) + 1/(1-7*x).
E.g.f.: e^(5*x) + e^(7*x). (End)
a(n) = 12*a(n-1) - 35*a(n-2) with a(0)=2, a(1)=12. - Vincenzo Librandi, Jul 21 2010
MATHEMATICA
Table[5^n + 7^n, {n, 0, 20}]
LinearRecurrence[{12, -35}, {2, 12}, 20] (* Harvey P. Dale, Aug 26 2021 *)
CROSSREFS
Sequence in context: A078469 A014351 A360318 * A370242 A352373 A006936
KEYWORD
easy,nonn
AUTHOR
Robert G. Wilson v, Aug 26 2002
STATUS
approved

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Last modified March 29 06:57 EDT 2024. Contains 371265 sequences. (Running on oeis4.)