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.

A242319 Number of length n+4+2 0..4 arrays with every value 0..4 appearing at least once in every consecutive 4+3 elements, and new values 0..4 introduced in order.

Table of values

n a(n)
1 140
2 440
3 1300
4 3648
5 10012
6 27368
7 75236
8 208976
9 577964
10 1596216
11 4408020
12 12176768
13 33645500
14 92967176
15 256849892
16 709617776
17 1960543660
18 5416680632
19 14965468916
20 41347189280
21 114235439996
22 315613828040
23 871989852740

List of values

[140, 440, 1300, 3648, 10012, 27368, 75236, 208976, 577964, 1596216, 4408020, 12176768, 33645500, 92967176, 256849892, 709617776, 1960543660, 5416680632, 14965468916, 41347189280, 114235439996, 315613828040, 871989852740]

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

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