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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.

A110047 Expansion of (1+2*x-4*x^2)/((2*x+1)*(2*x-1)*(4*x^2+4*x-1)).

Table of values

n a(n)
0 1
1 6
2 28
3 144
4 688
5 3360
6 16192
7 78336
8 378112
9 1826304
10 8817664
11 42577920
12 205582336
13 992649216
14 4792926208
15 23142334464
16 111741042688
17 539533639680
18 2605098729472
19 12578530000896
20 60734514921472
21 293252181786624
22 1415946786832384
23 6836795882864640

List of values

[1, 6, 28, 144, 688, 3360, 16192, 78336, 378112, 1826304, 8817664, 42577920, 205582336, 992649216, 4792926208, 23142334464, 111741042688, 539533639680, 2605098729472, 12578530000896, 60734514921472, 293252181786624, 1415946786832384, 6836795882864640]

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

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