A056778 - cp's OEIS frontend

A056778 Number of 3-element antichains on an unlabeled n-element set; equivalence classes of monotone Boolean functions of n variables with 3 mincuts under action of symmetric group S_n.

n	a(n)
0	0
1	0
2	0
3	2
4	9
5	30
6	84
7	202
8	437
9	872
10	1627
11	2874
12	4853
13	7882
14	12383
15	18902
16	28130
17	40934
18	58391
19	81812
20	112790
21	153238
22	205430
23	272054
24	356270
25	461754
26	592774
27	754252
28	951831
29	1191956
30	1481962
31	1830144
32	2245867
33	2739658
34	3323305
35	4009972
36	4814323
37	5752624
38	6842893

[0, 0, 0, 2, 9, 30, 84, 202, 437, 872, 1627, 2874, 4853, 7882, 12383, 18902, 28130, 40934, 58391, 81812, 112790, 153238, 205430, 272054, 356270, 461754, 592774, 754252, 951831, 1191956, 1481962, 1830144, 2245867, 2739658, 3323305, 4009972, 4814323, 5752624, 6842893]

cp's OEIS Frontend

A056778 Number of 3-element antichains on an unlabeled n-element set; equivalence classes of monotone Boolean functions of n variables with 3 mincuts under action of symmetric group S_n.

Table of values

List of values