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.

A249705 Number of length n+3 0..6 arrays with every four consecutive terms having the maximum of some two terms equal to the minimum of the remaining two terms.

Table of values

n a(n)
1 595
2 1729
3 4893
4 12789
5 29673
6 75495
7 200489
8 528755
9 1341901
10 3434085
11 8949133
12 23454657
13 60890031
14 157756415
15 410782645
16 1074162701
17 2805580083
18 7318553467
19 19112582503
20 50014143783
21 130956449801
22 342843638551
23 897866650281

List of values

[595, 1729, 4893, 12789, 29673, 75495, 200489, 528755, 1341901, 3434085, 8949133, 23454657, 60890031, 157756415, 410782645, 1074162701, 2805580083, 7318553467, 19112582503, 50014143783, 130956449801, 342843638551, 897866650281]

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

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