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A199419
4*7^n+1.
1
5, 29, 197, 1373, 9605, 67229, 470597, 3294173, 23059205, 161414429, 1129900997, 7909306973, 55365148805, 387556041629, 2712892291397, 18990246039773, 132931722278405, 930522055948829, 6513654391641797, 45595580741492573
OFFSET
0,1
FORMULA
a(n) = 7*a(n-1)-6.
a(n) = 8*a(n-1)-7*a(n-2).
G.f.: (5-11*x)/((1-x)*(1-7*x)).
PROG
(Magma) [4*7^n+1: n in [0..30]];
CROSSREFS
Sequence in context: A306932 A201856 A201115 * A094710 A367050 A216313
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Nov 06 2011
STATUS
approved