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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.

A278731 Number of nX5 0..3 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly one mistake.

Table of values

n a(n)
1 456
2 121520
3 28637916
4 6410559865
5 1351385130108
6 268284486351027
7 50067074390669892
8 8732216738504713198
9 1415177080112634284232
10 212485358907612452321760
11 29562031801069787043980684

List of values

[456, 121520, 28637916, 6410559865, 1351385130108, 268284486351027, 50067074390669892, 8732216738504713198, 1415177080112634284232, 212485358907612452321760, 29562031801069787043980684]

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

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