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.

A199763 a(n) = 9*11^n + 1.

Original entry on oeis.org

10, 100, 1090, 11980, 131770, 1449460, 15944050, 175384540, 1929229930, 21221529220, 233436821410, 2567805035500, 28245855390490, 310704409295380, 3417748502249170, 37595233524740860, 413547568772149450, 4549023256493643940, 50039255821430083330, 550431814035730916620
Offset: 0

Views

Author

Vincenzo Librandi, Nov 10 2011

Keywords

Crossrefs

Cf. A199760.

Programs

  • Magma
    [9*11^n+1: n in [0..30]];
  • Mathematica
    9*11^Range[0,20]+1 (* or *) LinearRecurrence[{12,-11},{10,100},20] (* Harvey P. Dale, Sep 06 2021 *)

Formula

a(n) = 11*a(n-1) - 10.
a(n) = 12*a(n-1) - 11*a(n-2).
G.f.: 10*(1-2*x)/((1-x)*(1-11*x)).
From Elmo R. Oliveira, Mar 25 2025: (Start)
E.g.f.: exp(x)*(9*exp(10*x) + 1).
a(n) = 10*A199760(n). (End)