A318393 - cp's OEIS frontend

A318393 Regular tetrangle where T(n,k,i) is the number of pairs of set partitions of {1,...,n} with meet of length k and join of length i.

n	a(n)
1	1
2	1
3	2
4	1
5	1
6	6
7	3
8	8
9	6
10	1
11	1
12	14
13	7
14	48
15	36
16	6
17	56
18	44
19	12
20	1
21	1
22	30
23	15
24	200
25	150
26	25
27	560
28	440
29	120
30	10
31	552
32	440
33	140
34	20
35	1
36	1
37	62
38	31
39	720
40	540
41	90
42	3640
43	2860
44	780
45	65
46	8280
47	6600
48	2100
49	300
50	15
51	7202
52	5632
53	1920
54	340
55	30
56	1
57	1
58	126
59	63
60	2408
61	1806

[1, 1, 2, 1, 1, 6, 3, 8, 6, 1, 1, 14, 7, 48, 36, 6, 56, 44, 12, 1, 1, 30, 15, 200, 150, 25, 560, 440, 120, 10, 552, 440, 140, 20, 1, 1, 62, 31, 720, 540, 90, 3640, 2860, 780, 65, 8280, 6600, 2100, 300, 15, 7202, 5632, 1920, 340, 30, 1, 1, 126, 63, 2408, 1806]

cp's OEIS Frontend

A318393 Regular tetrangle where T(n,k,i) is the number of pairs of set partitions of {1,...,n} with meet of length k and join of length i.

Table of values

List of values