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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.

A177730 Expansion of (6*x + 1) / ((x - 1)*(2*x - 1)*(4*x - 1)*(8*x - 1)).

Table of values

n a(n)
0 1
1 21
2 245
3 2325
4 20181
5 168021
6 1370965
7 11075925
8 89042261
9 714081621
10 5719635285
11 45785027925
12 366392038741
13 2931583636821
14 23454458533205
15 187642826282325
16 1501171242849621
17 12009484474209621
18 96076333921424725
19 768612503886583125
20 6148907361161794901

List of values

[1, 21, 245, 2325, 20181, 168021, 1370965, 11075925, 89042261, 714081621, 5719635285, 45785027925, 366392038741, 2931583636821, 23454458533205, 187642826282325, 1501171242849621, 12009484474209621, 96076333921424725, 768612503886583125, 6148907361161794901]

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

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