A259760 - cp's OEIS frontend

A259760 Triangle read by rows: T(n,k) is the number of partial idempotent mappings (of an n-chain) with breadth exactly k.

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	3
6	1
7	3
8	9
9	10
10	1
11	4
12	18
13	40
14	41
15	1
16	5
17	30
18	100
19	205
20	196
21	1
22	6
23	45
24	200
25	615
26	1176
27	1057
28	1
29	7
30	63
31	350
32	1435
33	4116
34	7399
35	6322
36	1
37	8
38	84
39	560
40	2870
41	10976
42	29596
43	50576
44	41393
45	1
46	9
47	108
48	840
49	5166
50	24696
51	88788
52	227592
53	372537
54	293608

[1, 1, 1, 1, 2, 3, 1, 3, 9, 10, 1, 4, 18, 40, 41, 1, 5, 30, 100, 205, 196, 1, 6, 45, 200, 615, 1176, 1057, 1, 7, 63, 350, 1435, 4116, 7399, 6322, 1, 8, 84, 560, 2870, 10976, 29596, 50576, 41393, 1, 9, 108, 840, 5166, 24696, 88788, 227592, 372537, 293608]

cp's OEIS Frontend

A259760 Triangle read by rows: T(n,k) is the number of partial idempotent mappings (of an n-chain) with breadth exactly k.

Table of values

List of values