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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.

A120462 Expansion of -2*x*(-3-2*x+4*x^2) / ((x-1)*(2*x+1)*(2*x-1)*(1+x)).

Table of values

n a(n)
0 0
1 6
2 4
3 22
4 20
5 86
6 84
7 342
8 340
9 1366
10 1364
11 5462
12 5460
13 21846
14 21844
15 87382
16 87380
17 349526
18 349524
19 1398102
20 1398100
21 5592406
22 5592404
23 22369622
24 22369620
25 89478486
26 89478484
27 357913942
28 357913940
29 1431655766
30 1431655764
31 5726623062

List of values

[0, 6, 4, 22, 20, 86, 84, 342, 340, 1366, 1364, 5462, 5460, 21846, 21844, 87382, 87380, 349526, 349524, 1398102, 1398100, 5592406, 5592404, 22369622, 22369620, 89478486, 89478484, 357913942, 357913940, 1431655766, 1431655764, 5726623062]

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

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