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.

A250684 Number of (n+1)X(n+1) 0..3 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing absolute value of x(i,j)-x(i-1,j) in the j direction.

Table of values

n a(n)
1 104
2 2920
3 74631
4 1670016
5 31728758
6 523260542
7 7662909389

List of values

[104, 2920, 74631, 1670016, 31728758, 523260542, 7662909389]

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

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