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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.

A379521 Expansion of (1/x) * Series_Reversion( x / ( (1+x)^3 * (1+2*x)^2 ) ).

Table of values

n a(n)
0 1
1 7
2 68
3 767
4 9425
5 122436
6 1653776
7 22992655
8 326863667
9 4729547023
10 69424933968
11 1031309398852
12 15474833826028
13 234201961398776
14 3570887895432504
15 54799089019823407
16 845757173849239415
17 13119400228929684885
18 204429551432900950068
19 3198423097762769254279
20 50225078058311068601425

List of values

[1, 7, 68, 767, 9425, 122436, 1653776, 22992655, 326863667, 4729547023, 69424933968, 1031309398852, 15474833826028, 234201961398776, 3570887895432504, 54799089019823407, 845757173849239415, 13119400228929684885, 204429551432900950068, 3198423097762769254279, 50225078058311068601425]

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

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