A108458 - cp's OEIS frontend

A108458 Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} in which the last block is the singleton {k}, 1<=k<=n; the blocks are ordered with increasing least elements.

n	a(n)
1	1
2	0
3	1
4	0
5	1
6	2
7	0
8	1
9	3
10	5
11	0
12	1
13	5
14	10
15	15
16	0
17	1
18	9
19	22
20	37
21	52
22	0
23	1
24	17
25	52
26	99
27	151
28	203
29	0
30	1
31	33
32	130
33	283
34	471
35	674
36	877
37	0
38	1
39	65
40	340
41	855
42	1561
43	2386
44	3263
45	4140
46	0
47	1
48	129
49	922
50	2707
51	5451
52	8930
53	12867
54	17007
55	21147
56	0
57	1
58	257
59	2572
60	8919
61	19921
62	35098
63	53411
64	73681
65	94828
66	115975

[1, 0, 1, 0, 1, 2, 0, 1, 3, 5, 0, 1, 5, 10, 15, 0, 1, 9, 22, 37, 52, 0, 1, 17, 52, 99, 151, 203, 0, 1, 33, 130, 283, 471, 674, 877, 0, 1, 65, 340, 855, 1561, 2386, 3263, 4140, 0, 1, 129, 922, 2707, 5451, 8930, 12867, 17007, 21147, 0, 1, 257, 2572, 8919, 19921, 35098, 53411, 73681, 94828, 115975]

cp's OEIS Frontend

A108458 Triangle read by rows: T(n,k) is the number of set partitions of {1,2,...,n} in which the last block is the singleton {k}, 1<=k<=n; the blocks are ordered with increasing least elements.

Table of values

List of values