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.

A090309 a(n) = 20*a(n-1) + a(n-2), starting with a(0) = 2 and a(1) = 20.

Table of values

n a(n)
0 2
1 20
2 402
3 8060
4 161602
5 3240100
6 64963602
7 1302512140
8 26115206402
9 523606640180
10 10498248010002
11 210488566840220
12 4220269584814402
13 84615880263128260
14 1696537874847379602
15 34015373377210720300

List of values

[2, 20, 402, 8060, 161602, 3240100, 64963602, 1302512140, 26115206402, 523606640180, 10498248010002, 210488566840220, 4220269584814402, 84615880263128260, 1696537874847379602, 34015373377210720300]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement.