A193577 a(n) = 5*7^n.
5, 35, 245, 1715, 12005, 84035, 588245, 4117715, 28824005, 201768035, 1412376245, 9886633715, 69206436005, 484445052035, 3391115364245, 23737807549715, 166164652848005, 1163152569936035, 8142067989552245, 56994475926865715
Offset: 0
Links
- Vincenzo Librandi, Table of n, a(n) for n = 0..1000
- Index entries for linear recurrences with constant coefficients, signature (7).
Programs
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Magma
[5*7^n: n in [0..20]];
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Mathematica
5 7^Range[0,20] (* or *) NestList[7#&,5,20] (* Harvey P. Dale, Dec 10 2017 *)
Formula
G.f.: 5/(1-7*x).
a(n) = 7*a(n-1), a(0)=5.