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.

A248837 Number of length n arrays x(i), i=1..n with x(i) in 0..i and no value appearing more than 3 times.

Table of values

n a(n)
1 2
2 6
3 24
4 118
5 686
6 4598
7 34872
8 295044
9 2753958
10 28103804
11 311216626
12 3716341042
13 47597786154
14 650812077852
15 9461423560788
16 145724617925326
17 2370293673319292
18 40600119927220706
19 730458115445479734
20 13772063820971722638

List of values

[2, 6, 24, 118, 686, 4598, 34872, 295044, 2753958, 28103804, 311216626, 3716341042, 47597786154, 650812077852, 9461423560788, 145724617925326, 2370293673319292, 40600119927220706, 730458115445479734, 13772063820971722638]

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

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