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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.

A184574 T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

Table of values

n a(n)
1 14178
2 102445
3 102445
4 545662
5 993538
6 545662
7 2430950
8 6803631
9 6803631
10 2430950
11 9496395
12 37767705
13 57374460
14 37767705
15 9496395
16 33351260
17 179122657
18 380532059
19 380532059
20 179122657
21 33351260
22 107058241
23 748499580
24 2113138210

List of values

[14178, 102445, 102445, 545662, 993538, 545662, 2430950, 6803631, 6803631, 2430950, 9496395, 37767705, 57374460, 37767705, 9496395, 33351260, 179122657, 380532059, 380532059, 179122657, 33351260, 107058241, 748499580, 2113138210]

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

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