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.

A249713 Number of length 7+3 0..n 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 72
2 1177
3 7056
4 27113
5 80360
6 200489
7 442144
8 888465
9 1659976
10 2924889
11 4910896
12 7918521
13 12336104
14 18656489
15 27495488
16 39612193
17 55931208
18 77566873
19 105849552
20 142354057
21 188930280
22 247736105
23 321272672
24 412422065
25 524487496
26 661236057

List of values

[72, 1177, 7056, 27113, 80360, 200489, 442144, 888465, 1659976, 2924889, 4910896, 7918521, 12336104, 18656489, 27495488, 39612193, 55931208, 77566873, 105849552, 142354057, 188930280, 247736105, 321272672, 412422065, 524487496, 661236057]

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

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