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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.

A278633 Number of nX7 0..2 arrays with rows in nondecreasing lexicographic order and columns in nonincreasing lexicographic order, but with exactly two mistakes.

Table of values

n a(n)
1 1107
2 932205
3 541463431
4 309971214338
5 175644502146694
6 94782697883923436
7 47369705674953303984
8 21685396319356730003339
9 9098829152955190125398905
10 3522319073864419078316881080
11 1269570351401707348639148214535

List of values

[1107, 932205, 541463431, 309971214338, 175644502146694, 94782697883923436, 47369705674953303984, 21685396319356730003339, 9098829152955190125398905, 3522319073864419078316881080, 1269570351401707348639148214535]

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

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