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.

A237391 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays colored with the maximum plus the upper median minus the minimum of every 2X2 subblock.

Table of values

n a(n)
1 81
2 434
3 434
4 2336
5 3240
6 2336
7 12624
8 24340
9 24340
10 12624
11 68064
12 183764
13 255937
14 183764
15 68064
16 366568
17 1379886
18 2712486
19 2712486
20 1379886
21 366568
22 1976940
23 10406596
24 28732972
25 41204198
26 28732972
27 10406596
28 1976940
29 10657560
30 78612538

List of values

[81, 434, 434, 2336, 3240, 2336, 12624, 24340, 24340, 12624, 68064, 183764, 255937, 183764, 68064, 366568, 1379886, 2712486, 2712486, 1379886, 366568, 1976940, 10406596, 28732972, 41204198, 28732972, 10406596, 1976940, 10657560, 78612538]

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

Content is available under The OEIS End-User License Agreement.