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.

A293471 a(n) = [x^n] (1/(1 - 2*x/(1 - 2*x/(1 - 4*x/(1 - 4*x/(1 - 6*x/(1 - 6*x/(1 - ...))))))))^n, a continued fraction.

Table of values

n a(n)
0 1
1 2
2 20
3 248
4 3472
5 53152
6 878144
7 15577984
8 296411392
9 6054973952
10 132994708480
11 3144712222720
12 80063883022336
13 2192452931723264
14 64427309553434624
15 2025284853319303168
16 67859418068644069376
17 2414526405567056052224
18 90909088845844899430400
19 3610058425696043667030016

List of values

[1, 2, 20, 248, 3472, 53152, 878144, 15577984, 296411392, 6054973952, 132994708480, 3144712222720, 80063883022336, 2192452931723264, 64427309553434624, 2025284853319303168, 67859418068644069376, 2414526405567056052224, 90909088845844899430400, 3610058425696043667030016]

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

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