A366540 - cp's OEIS frontend

A366540 Number of commutative 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.

n	a(n)
1	1
2	6
3	77
4	2100
5	122694
6	15459444
7	4220448492
8	2504511958416
9	3237984252258520
10	9135209892155631900
11	56307395363835925220625
12	758909821892432106622050000
13	22380517337924566377547475850000
14	1444814401119843300312851440909560000
15	204254167807759030850057485271236254820800

[1, 6, 77, 2100, 122694, 15459444, 4220448492, 2504511958416, 3237984252258520, 9135209892155631900, 56307395363835925220625, 758909821892432106622050000, 22380517337924566377547475850000, 1444814401119843300312851440909560000, 204254167807759030850057485271236254820800]

cp's OEIS Frontend

A366540 Number of commutative 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

List of values