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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.

A371406 Expansion of (1/x) * Series_Reversion( x / ( (1+x)^2 * (1+2*x)^2 ) ).

Table of values

n a(n)
0 1
1 6
2 49
3 462
4 4734
5 51216
6 575705
7 6657846
8 78703438
9 946740132
10 11551512042
11 142616584380
12 1778372098000
13 22365031140900
14 283341912929865
15 3612782260978470
16 46326552943960278
17 597034029166804068
18 7728885814331709374
19 100458438481544424996

List of values

[1, 6, 49, 462, 4734, 51216, 575705, 6657846, 78703438, 946740132, 11551512042, 142616584380, 1778372098000, 22365031140900, 283341912929865, 3612782260978470, 46326552943960278, 597034029166804068, 7728885814331709374, 100458438481544424996]

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

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