A056940 - cp's OEIS frontend

A056940 Number of antichains (or order ideals) in the poset 4mn or plane partitions with at most m rows and n columns and entries <= 4.

n	a(n)
0	1
1	1
2	1
3	1
4	5
5	1
6	1
7	15
8	15
9	1
10	1
11	35
12	105
13	35
14	1
15	1
16	70
17	490
18	490
19	70
20	1
21	1
22	126
23	1764
24	4116
25	1764
26	126
27	1
28	1
29	210
30	5292
31	24696
32	24696
33	5292
34	210
35	1
36	1
37	330
38	13860
39	116424
40	232848
41	116424
42	13860
43	330
44	1
45	1
46	495
47	32670
48	457380
49	1646568
50	1646568
51	457380
52	32670
53	495
54	1

[1, 1, 1, 1, 5, 1, 1, 15, 15, 1, 1, 35, 105, 35, 1, 1, 70, 490, 490, 70, 1, 1, 126, 1764, 4116, 1764, 126, 1, 1, 210, 5292, 24696, 24696, 5292, 210, 1, 1, 330, 13860, 116424, 232848, 116424, 13860, 330, 1, 1, 495, 32670, 457380, 1646568, 1646568, 457380, 32670, 495, 1]

cp's OEIS Frontend

A056940 Number of antichains (or order ideals) in the poset 4mn or plane partitions with at most m rows and n columns and entries <= 4.

Table of values

List of values

cp's OEIS Frontend

A056940 Number of antichains (or order ideals) in the poset 4*m*n or plane partitions with at most m rows and n columns and entries <= 4.

Table of values

List of values

A056940 Number of antichains (or order ideals) in the poset 4mn or plane partitions with at most m rows and n columns and entries <= 4.