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.

A250970 Number of (n+1)X(5+1) 0..1 arrays with no 2X2 subblock having the sum of its diagonal elements less than the absolute difference of its antidiagonal elements.

Table of values

n a(n)
1 2121
2 77537
3 2833397
4 103684186
5 3794909318
6 138900769559
7 5084110136919
8 186091438754901
9 6811422962008298
10 249315542243292284
11 9125588509861083659
12 334019954168148561523
13 12225987350399215480885
14 447502506618626972091831

List of values

[2121, 77537, 2833397, 103684186, 3794909318, 138900769559, 5084110136919, 186091438754901, 6811422962008298, 249315542243292284, 9125588509861083659, 334019954168148561523, 12225987350399215480885, 447502506618626972091831]

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

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