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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.

A278732 Number of n X 6 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 1128
2 712406
3 506031118
4 374757577056
5 268284486351027
6 183338866913973336
7 119979123054325787300
8 75059724220196821830976
9 44560888984275849849896791
10 24904255595102014593384961783

List of values

[1128, 712406, 506031118, 374757577056, 268284486351027, 183338866913973336, 119979123054325787300, 75059724220196821830976, 44560888984275849849896791, 24904255595102014593384961783]

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

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