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.

A235166 E.g.f. satisfies: A'(x) = A(x)^2/A(-x)^2, with A(0)=1.

Table of values

n a(n)
0 1
1 1
2 4
3 16
4 88
5 640
6 5440
7 54400
8 620800
9 7966720
10 113651200
11 1783091200
12 30519808000
13 565916876800
14 11300689100800
15 241781039104000
16 5517822373888000
17 133795711025152000
18 3435107208822784000
19 93093522064998400000
20 2655675672405606400000
21 79546285618254315520000

List of values

[1, 1, 4, 16, 88, 640, 5440, 54400, 620800, 7966720, 113651200, 1783091200, 30519808000, 565916876800, 11300689100800, 241781039104000, 5517822373888000, 133795711025152000, 3435107208822784000, 93093522064998400000, 2655675672405606400000, 79546285618254315520000]

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

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