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.

A278623 Number of n X 4 0..2 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 51
2 1952
3 49503
4 1069536
5 21121532
6 387542112
7 6594175430
8 103536313036
9 1496475492375
10 19928249063688
11 245280439959902
12 2802425055340520
13 29863427285241827
14 298206737876251916
15 2802780797553511873

List of values

[51, 1952, 49503, 1069536, 21121532, 387542112, 6594175430, 103536313036, 1496475492375, 19928249063688, 245280439959902, 2802425055340520, 29863427285241827, 298206737876251916, 2802780797553511873]

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

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