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.

A250754 Number of (n+1) X (7+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing x(i,j)+x(i-1,j) in the j direction.

Table of values

n a(n)
1 527
2 1707
3 5471
4 17211
5 53327
6 163467
7 497471
8 1506651
9 4548527
10 13702827
11 41223071
12 123898491
13 372154127
14 1117379787
15 3353974271
16 10065592731
17 30204118127
18 90627034347
19 271910463071
20 815790109371
21 2447487768527

List of values

[527, 1707, 5471, 17211, 53327, 163467, 497471, 1506651, 4548527, 13702827, 41223071, 123898491, 372154127, 1117379787, 3353974271, 10065592731, 30204118127, 90627034347, 271910463071, 815790109371, 2447487768527]

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

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