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.

A201370 Number of n X n 0..1 arrays with rows and columns lexicographically nondecreasing read forwards, and nonincreasing read backwards.

Table of values

n a(n)
1 2
2 3
3 8
4 36
5 268
6 3739
7 115168
8 8866257
9 1799674094
10 976134459840

List of values

[2, 3, 8, 36, 268, 3739, 115168, 8866257, 1799674094, 976134459840]