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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.

A268249 T(n,k)=Number of nXk 0..k arrays with every repeated value in every row greater than, and every column greater than or equal to, the previous repeated value.

Table of values

n a(n)
1 2
2 9
3 4
4 60
5 81
6 8
7 570
8 3600
9 729
10 15
11 6960
12 324900
13 216000
14 6084
15 28
16 104006
17 48441600
18 185193000
19 12067722
20 49284
21 51
22 1837752
23 10817248036
24 337153536000
25 98956027822
26 648144348
27 386884
28 92
29 37478718
30 3377332413504
31 1125058699232216

List of values

[2, 9, 4, 60, 81, 8, 570, 3600, 729, 15, 6960, 324900, 216000, 6084, 28, 104006, 48441600, 185193000, 12067722, 49284, 51, 1837752, 10817248036, 337153536000, 98956027822, 648144348, 386884, 92, 37478718, 3377332413504, 1125058699232216]

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

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