A144643 - cp's OEIS frontend

A144643 Triangle read by rows: T(n,k) = number of partitions of [1..k] into n nonempty clumps of sizes 1, 2, 3 or 4 (n >= 0, 0 <= k <= 4n).

n	a(n)
0	1
1	0
2	1
3	1
4	1
5	1
6	0
7	0
8	1
9	3
10	7
11	15
12	25
13	35
14	35
15	0
16	0
17	0
18	1
19	6
20	25
21	90
22	280
23	770
24	1855
25	3675
26	5775
27	5775
28	0
29	0
30	0
31	0
32	1
33	10
34	65
35	350
36	1645
37	6930
38	26425
39	90475
40	275275
41	725725
42	1576575
43	2627625
44	2627625
45	0
46	0
47	0
48	0
49	0
50	1
51	15
52	140
53	1050
54	6825
55	39795
56	211750
57	1033725
58	4629625

[1, 0, 1, 1, 1, 1, 0, 0, 1, 3, 7, 15, 25, 35, 35, 0, 0, 0, 1, 6, 25, 90, 280, 770, 1855, 3675, 5775, 5775, 0, 0, 0, 0, 1, 10, 65, 350, 1645, 6930, 26425, 90475, 275275, 725725, 1576575, 2627625, 2627625, 0, 0, 0, 0, 0, 1, 15, 140, 1050, 6825, 39795, 211750, 1033725, 4629625]

cp's OEIS Frontend

A144643 Triangle read by rows: T(n,k) = number of partitions of [1..k] into n nonempty clumps of sizes 1, 2, 3 or 4 (n >= 0, 0 <= k <= 4n).

Table of values

List of values