cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

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

Original entry on oeis.org

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

Views

Author

Mark Dols, Aug 13 2010

Keywords

Crossrefs

Programs

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

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)