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.

A200875 Number of 0..n arrays x(0..6) of 7 elements without any interior element greater than both neighbors or less than both neighbors.

Table of values

n a(n)
1 42
2 343
3 1528
4 4917
5 12890
6 29325
7 60112
8 113745
9 201994
10 340659
11 550408
12 857701
13 1295802
14 1905881
15 2738208
16 3853441
17 5324010
18 7235599
19 9688728
20 12800437
21 16706074
22 21561189
23 27543536
24 34855185
25 43724746
26 54409707
27 67198888
28 82415013

List of values

[42, 343, 1528, 4917, 12890, 29325, 60112, 113745, 201994, 340659, 550408, 857701, 1295802, 1905881, 2738208, 3853441, 5324010, 7235599, 9688728, 12800437, 16706074, 21561189, 27543536, 34855185, 43724746, 54409707, 67198888, 82415013]

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

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