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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.

A307490 G.f. A(x) satisfies: A(x) = 1/(1 - x*A(x) - x^2*A(x)^2/(1 - x^2*A(x)^2/(1 - x^2*A(x)^2/(1 - ...)))), a continued fraction.

Table of values

n a(n)
0 1
1 1
2 3
3 10
4 39
5 161
6 700
7 3144
8 14495
9 68167
10 325787
11 1577654
12 7724612
13 38176620
14 190196440
15 954182528
16 4816268367
17 24441691827
18 124633707865
19 638272397350
20 3281390284623
21 16929034639153
22 87617665434328
23 454796186669800
24 2367025393846724
25 12349738834935876

List of values

[1, 1, 3, 10, 39, 161, 700, 3144, 14495, 68167, 325787, 1577654, 7724612, 38176620, 190196440, 954182528, 4816268367, 24441691827, 124633707865, 638272397350, 3281390284623, 16929034639153, 87617665434328, 454796186669800, 2367025393846724, 12349738834935876]

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

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