A037526 Base 9 digits are, in order, the first n terms of the periodic sequence with initial period 2,1,0.

2, 19, 171, 1541, 13870, 124830, 1123472, 10111249, 91001241, 819011171, 7371100540, 66339904860, 597059143742, 5373532293679, 48361790643111, 435256115788001, 3917305042092010, 35255745378828090, 317301708409452812, 2855715375685075309, 25701438381165677781, 231312945430491100031

Offset

1,1

Links

Table of n, a(n) for n=1..22.

Index entries for linear recurrences with constant coefficients, signature (9,0,1,-9).

Formula

G.f.: x*(2+x) / ( (x-1)*(9*x-1)*(1+x+x^2) ). - R. J. Mathar, Nov 21 2011

a(n) = floor(171*9^n/728). - Kevin Ryde, Jul 21 2022

Crossrefs

Sequence in context: A065898 A290188 A083196 * A037735 A224753 A037558

Adjacent sequences: A037523 A037524 A037525 * A037527 A037528 A037529

Keyword

nonn,base,easy

Author

Clark Kimberling

Extensions

More terms from Stefano Spezia, Jul 21 2022

Status

approved