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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.

A386389 Expansion of (1/x) * Series_Reversion( x/(1+9*x+16*x^2) ).

Table of values

n a(n)
0 1
1 9
2 97
3 1161
4 14849
5 198729
6 2748641
7 38977353
8 563644673
9 8280210825
10 123226850913
11 1853870946057
12 28148395838721
13 430791367720905
14 6638484468424929
15 102918165951351753
16 1604104541561284097
17 25121009971212463881
18 395085505395126968417
19 6237523016309454855561

List of values

[1, 9, 97, 1161, 14849, 198729, 2748641, 38977353, 563644673, 8280210825, 123226850913, 1853870946057, 28148395838721, 430791367720905, 6638484468424929, 102918165951351753, 1604104541561284097, 25121009971212463881, 395085505395126968417, 6237523016309454855561]

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

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