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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.

A379522 Expansion of (1/x) * Series_Reversion( x / ( (1+x)^3 * (1+2*x)^3 ) ).

Table of values

n a(n)
0 1
1 9
2 114
3 1683
4 27111
5 462060
6 8192078
7 149541975
8 2791795695
9 53056724409
10 1023021616920
11 19963667407572
12 393536736830724
13 7824888965728584
14 156750391932619254
15 3160558799674447167
16 64092227061832430895
17 1306327265854324847595
18 26746550927141536784370

List of values

[1, 9, 114, 1683, 27111, 462060, 8192078, 149541975, 2791795695, 53056724409, 1023021616920, 19963667407572, 393536736830724, 7824888965728584, 156750391932619254, 3160558799674447167, 64092227061832430895, 1306327265854324847595, 26746550927141536784370]

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

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