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A199422 5*7^n+1. 1
6, 36, 246, 1716, 12006, 84036, 588246, 4117716, 28824006, 201768036, 1412376246, 9886633716, 69206436006, 484445052036, 3391115364246, 23737807549716, 166164652848006, 1163152569936036, 8142067989552246, 56994475926865716 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
a(n) = 6*A083067(n).
a(n) = 7*a(n-1)-6.
a(n) = 8*a(n-1)-7*a(n-2).
G.f.: 6*(1-2*x)/((1-x)*(1-7*x)).
MATHEMATICA
5*7^Range[0, 20]+1 (* or *) LinearRecurrence[{8, -7}, {6, 36}, 20] (* Harvey P. Dale, Dec 23 2012 *)
PROG
(Magma) [5*7^n+1: n in [0..30]];
CROSSREFS
Sequence in context: A180119 A181964 A354457 * A049431 A049428 A129063
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 07 2011
STATUS
approved

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Last modified February 22 06:02 EST 2024. Contains 370240 sequences. (Running on oeis4.)