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.

A203420 a(n) = A203418(n)/A000178(n).

Table of values

n a(n)
1 1
2 2
3 8
4 20
5 40
6 384
7 10240
8 126720
9 1013760
10 48660480
11 7612661760
12 473174507520
13 16701626253312
14 4036421002199040
15 407426244909465600
16 23814785343474892800
17 932976775107465707520
18 26694111965427724713984
19 9044593230639040844267520

List of values

[1, 2, 8, 20, 40, 384, 10240, 126720, 1013760, 48660480, 7612661760, 473174507520, 16701626253312, 4036421002199040, 407426244909465600, 23814785343474892800, 932976775107465707520, 26694111965427724713984, 9044593230639040844267520]

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

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