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.

A267975 Number of 1 X n 0..3 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

Table of values

n a(n)
1 4
2 16
3 64
4 250
5 964
6 3674
7 13868
8 51917
9 192980
10 712868
11 2618876
12 9573915
13 34845780
14 126322410
15 456285828
16 1642687662
17 5895922368
18 21102304252
19 75332038300
20 268275675007
21 953247943192
22 3380004168904
23 11961143709736
24 42249741430325

List of values

[4, 16, 64, 250, 964, 3674, 13868, 51917, 192980, 712868, 2618876, 9573915, 34845780, 126322410, 456285828, 1642687662, 5895922368, 21102304252, 75332038300, 268275675007, 953247943192, 3380004168904, 11961143709736, 42249741430325]

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

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