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.

A250811 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 min(x(i,j),x(i-1,j)) in the j direction.

Table of values

n a(n)
1 2025
2 8049
3 29145
4 98481
5 318585
6 1003089
7 3104985
8 9507441
9 28908345
10 87498129
11 264041625
12 795220401
13 2391853305
14 7187945169
15 21588607065
16 64815365361
17 194545185465
18 583833736209
19 1751897569305
20 5256485430321
21 15771041736825

List of values

[2025, 8049, 29145, 98481, 318585, 1003089, 3104985, 9507441, 28908345, 87498129, 264041625, 795220401, 2391853305, 7187945169, 21588607065, 64815365361, 194545185465, 583833736209, 1751897569305, 5256485430321, 15771041736825]

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

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