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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.

A379382 G.f. A(x) satisfies A(x) = sqrt( (1 + 2*x*A(x))/(1 - 2*x*A(x)^2) ).

Table of values

n a(n)
0 1
1 2
2 8
3 48
4 336
5 2560
6 20608
7 172416
8 1484288
9 13062144
10 116977664
11 1062600704
12 9767067648
13 90673700864
14 848971661312
15 8007542571008
16 76014137180160
17 725681289822208
18 6962697126019072
19 67105309925048320
20 649362348326256640
21 6306663216709632000

List of values

[1, 2, 8, 48, 336, 2560, 20608, 172416, 1484288, 13062144, 116977664, 1062600704, 9767067648, 90673700864, 848971661312, 8007542571008, 76014137180160, 725681289822208, 6962697126019072, 67105309925048320, 649362348326256640, 6306663216709632000]

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

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