cp's OEIS Frontend

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.

A138020 G.f. satisfies A(x) = sqrt( (1 + 2*x*A(x)) / (1 - 2*x*A(x)) ).

Table of values

n a(n)
0 1
1 2
2 6
3 24
4 110
5 544
6 2828
7 15232
8 84246
9 475648
10 2730068
11 15882240
12 93438540
13 554967040
14 3323125528
15 20039827456
16 121597985254
17 741871845376
18 4548193111428
19 28004975116288
20 173113004348580
21 1073893324357632
22 6683288759506856
23 41715337804120064

List of values

[1, 2, 6, 24, 110, 544, 2828, 15232, 84246, 475648, 2730068, 15882240, 93438540, 554967040, 3323125528, 20039827456, 121597985254, 741871845376, 4548193111428, 28004975116288, 173113004348580, 1073893324357632, 6683288759506856, 41715337804120064]

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

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