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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.

A251249 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having the sum of its diagonal elements less than the minimum of its antidiagonal elements.

Table of values

n a(n)
1 75
2 621
3 621
4 5139
5 14265
6 5139
7 42525
8 327753
9 327753
10 42525
11 351891
12 7530633
13 20904689
14 7530633
15 351891
16 2911869
17 173028393
18 1333268433
19 1333268433
20 173028393
21 2911869
22 24095475
23 3975606801
24 85032883789
25 236035946835

List of values

[75, 621, 621, 5139, 14265, 5139, 42525, 327753, 327753, 42525, 351891, 7530633, 20904689, 7530633, 351891, 2911869, 173028393, 1333268433, 1333268433, 173028393, 2911869, 24095475, 3975606801, 85032883789, 236035946835]

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

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