A180153 a(n) = 10*a(n-1) + A109242(n).

1, 121, 12421, 1246421, 124696421, 12470296421, 1247037296421, 124703817296421, 12470382717296421, 1247038282717296421, 124703828392717296421, 12470382840592717296421, 1247038284073592717296421, 124703828407513592717296421, 12470382840753013592717296421

Offset

1,2

Links

Colin Barker, Table of n, a(n) for n = 1..500

Index entries for linear recurrences with constant coefficients, signature (121,-2220,12100,-10000).

Formula

From Colin Barker, Oct 03 2015: (Start)

a(n) = 121*a(n-1)-2220*a(n-2)+12100*a(n-3)-10000*a(n-4) for n>4.

G.f.: x / ((x-1)*(10*x-1)^2*(100*x-1)).

(End)

Prog

(PARI) Vec(x / ((x-1)*(10*x-1)^2*(100*x-1)) + O(x^30)) \\ Colin Barker, Oct 03 2015

Crossrefs

Cf. A109242, A000292, A002620, A059259, A094028.

Sequence in context: A068117 A080162 A030174 * A178510 A066625 A078277

Adjacent sequences: A180150 A180151 A180152 * A180154 A180155 A180156

Keyword

nonn,easy

Author

Mark Dols, Aug 13 2010

Status

approved