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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.

A278730 Number of nX4 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)
1 155
2 17352
3 1410818
4 99992428
5 6410559865
6 374757577056
7 19983433877142
8 971720519011047
9 43159978267689118
10 1757375854436887414
11 65916636060336105608
12 2289699277183162173304
13 74046423246945148450929

List of values

[155, 17352, 1410818, 99992428, 6410559865, 374757577056, 19983433877142, 971720519011047, 43159978267689118, 1757375854436887414, 65916636060336105608, 2289699277183162173304, 74046423246945148450929]

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

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