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A199488 10*7^n+1. 1
11, 71, 491, 3431, 24011, 168071, 1176491, 8235431, 57648011, 403536071, 2824752491, 19773267431, 138412872011, 968890104071, 6782230728491, 47475615099431, 332329305696011, 2326305139872071, 16284135979104491, 113988951853731431 (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.: (11-17*x)/((1-x)*(1-7*x)).
MATHEMATICA
10*7^Range[0, 20]+1 (* or *) LinearRecurrence[{8, -7}, {11, 71}, 20] (* Harvey P. Dale, Sep 23 2013 *)
PROG
(Magma) [10*7^n+1: n in [0..30]];
CROSSREFS
Sequence in context: A319535 A300541 A123362 * A068847 A139185 A103998
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 07 2011
STATUS
approved

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Last modified May 20 19:00 EDT 2024. Contains 372720 sequences. (Running on oeis4.)