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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.

A186180 T(n,k)=Number of (n+2)X(k+2) 0..5 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order.

Table of values

n a(n)
1 520017
2 10084236
3 10084236
4 143369699
5 311128593
6 143369699
7 1662436696
8 6520730198
9 6520730198
10 1662436696
11 16382439469
12 105970767207
13 188034884094
14 105970767207
15 16382439469
16 140871930232
17 1414199542732
18 4041778238254

List of values

[520017, 10084236, 10084236, 143369699, 311128593, 143369699, 1662436696, 6520730198, 6520730198, 1662436696, 16382439469, 105970767207, 188034884094, 105970767207, 16382439469, 140871930232, 1414199542732, 4041778238254]

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

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