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A199421 (5*7^n+1)/2. 1
3, 18, 123, 858, 6003, 42018, 294123, 2058858, 14412003, 100884018, 706188123, 4943316858, 34603218003, 242222526018, 1695557682123, 11868903774858, 83082326424003, 581576284968018, 4071033994776123, 28497237963432858 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,1

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

Index entries for linear recurrences with constant coefficients, signature (8,-7).

FORMULA

a(n) = 7*a(n-1)-3.

a(n) = 8*a(n-1)-7*a(n-2).

G.f.: 3*(1-2*x)/((1-x)*(1-7*x)).

PROG

(MAGMA) [(5*7^n+1)/2: n in [0..30]];

CROSSREFS

Sequence in context: A074558 A074564 A108241 * A305869 A181998 A176277

Adjacent sequences:  A199418 A199419 A199420 * A199422 A199423 A199424

KEYWORD

nonn,easy

AUTHOR

Vincenzo Librandi, Nov 07 2011

STATUS

approved

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Last modified May 26 00:32 EDT 2020. Contains 334613 sequences. (Running on oeis4.)