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.

A278431 Number of nX3 0..3 arrays with rows and columns in lexicographic nondecreasing order but with exactly one mistake.

Table of values

n a(n)
1 40
2 1609
3 57760
4 2116789
5 67971132
6 1796061464
7 39513263094
8 743248079740
9 12242795030458
10 179948822861856
11 2394561544941994
12 29174653111810701
13 328380943500399272
14 3439574456695348801
15 33729578625174035514

List of values

[40, 1609, 57760, 2116789, 67971132, 1796061464, 39513263094, 743248079740, 12242795030458, 179948822861856, 2394561544941994, 29174653111810701, 328380943500399272, 3439574456695348801, 33729578625174035514]

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

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