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.

A270473 Expansion of g.f. (1-5*x)/(1-9*x).

Table of values

n a(n)
0 1
1 4
2 36
3 324
4 2916
5 26244
6 236196
7 2125764
8 19131876
9 172186884
10 1549681956
11 13947137604
12 125524238436
13 1129718145924
14 10167463313316
15 91507169819844
16 823564528378596
17 7412080755407364
18 66708726798666276
19 600378541187996484
20 5403406870691968356
21 48630661836227715204

List of values

[1, 4, 36, 324, 2916, 26244, 236196, 2125764, 19131876, 172186884, 1549681956, 13947137604, 125524238436, 1129718145924, 10167463313316, 91507169819844, 823564528378596, 7412080755407364, 66708726798666276, 600378541187996484, 5403406870691968356, 48630661836227715204]

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

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