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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.

A278308 Number of nX7 0..2 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

Table of values

n a(n)
1 504
2 197981
3 114457714
4 69684770828
5 38819080346585
6 20065923383306483
7 10174217016822816668
8 5193800251722254864596
9 2618709455820562585030428
10 1260058503482337718156082135
11 564882872428920086722942207177

List of values

[504, 197981, 114457714, 69684770828, 38819080346585, 20065923383306483, 10174217016822816668, 5193800251722254864596, 2618709455820562585030428, 1260058503482337718156082135, 564882872428920086722942207177]

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

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