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.

A242318 Number of length n+3+2 0..3 arrays with every value 0..3 appearing at least once in every consecutive 3+3 elements, and new values 0..3 introduced in order.

Table of values

n a(n)
1 65
2 185
3 503
4 1316
5 3398
6 8801
7 23069
8 60197
9 156887
10 408962
11 1066514
12 2781611
13 7253453
14 18914369
15 49323167
16 128621684
17 335409314
18 874649537
19 2280834353
20 5947765493
21 15510073823
22 40445831522
23 105471145814
24 275038567523

List of values

[65, 185, 503, 1316, 3398, 8801, 23069, 60197, 156887, 408962, 1066514, 2781611, 7253453, 18914369, 49323167, 128621684, 335409314, 874649537, 2280834353, 5947765493, 15510073823, 40445831522, 105471145814, 275038567523]

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

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