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.

A360612 Number of binary operators defined on the finite chain L_n={0,1,...n}, C:L_n^2-> L_n, which are increasing in each argument, and satisfy the boundary conditions C(0,n)=C(n,0)=0 and C(n,n)=n.

Table of values

n a(n)
1 1
2 14
3 805
4 208152
5 250409016
6 1423422089804
7 38533696399916432
8 4988815527667401921920
9 3096067500138473517778378240
10 9222307552079662925642825622240000
11 131945758198070262889738914466064452265625
12 9070830675953705403006049148134626173379375000000

List of values

[1, 14, 805, 208152, 250409016, 1423422089804, 38533696399916432, 4988815527667401921920, 3096067500138473517778378240, 9222307552079662925642825622240000, 131945758198070262889738914466064452265625, 9070830675953705403006049148134626173379375000000]