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A199487 9*7^n+1. 1
10, 64, 442, 3088, 21610, 151264, 1058842, 7411888, 51883210, 363182464, 2542277242, 17795940688, 124571584810, 872001093664, 6104007655642, 42728053589488, 299096375126410, 2093674625884864, 14655722381194042, 102590056668358288 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,1
LINKS
FORMULA
a(n) = 7*a(n-1)-6.
a(n) = 8*a(n-1)-7*a(n-2).
G.f.: 2*(5-8*x)/((1-x)*(1-7*x)).
MATHEMATICA
(9*7^Range[0, 20])+1 (* or *) LinearRecurrence[{8, -7}, {10, 64}, 20] (* Harvey P. Dale, May 10 2014 *)
PROG
(Magma) [9*7^n+1: n in [0..30]];
CROSSREFS
Sequence in context: A219934 A155618 A249978 * A144041 A352113 A286070
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 07 2011
STATUS
approved

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Last modified March 29 02:13 EDT 2024. Contains 371264 sequences. (Running on oeis4.)