A141618 - cp's OEIS frontend

A141618 Triangle read by rows: number of nilpotent partial transformations (of an n-element set) of height r (height(alpha) = |Im(alpha)|), 0 <= r < n.

n	a(n)
1	1
2	1
3	2
4	1
5	9
6	6
7	1
8	28
9	72
10	24
11	1
12	75
13	500
14	600
15	120
16	1
17	186
18	2700
19	7800
20	5400
21	720
22	1
23	441
24	12642
25	73500
26	117600
27	52920
28	5040
29	1
30	1016
31	54096
32	571536
33	1764000
34	1787520
35	564480
36	40320
37	1
38	2295
39	217800
40	3916080
41	21019824
42	40007520
43	27941760
44	6531840
45	362880
46	1
47	5110
48	839700
49	24555600
50	214326000

[1, 1, 2, 1, 9, 6, 1, 28, 72, 24, 1, 75, 500, 600, 120, 1, 186, 2700, 7800, 5400, 720, 1, 441, 12642, 73500, 117600, 52920, 5040, 1, 1016, 54096, 571536, 1764000, 1787520, 564480, 40320, 1, 2295, 217800, 3916080, 21019824, 40007520, 27941760, 6531840, 362880, 1, 5110, 839700, 24555600, 214326000]

cp's OEIS Frontend

A141618 Triangle read by rows: number of nilpotent partial transformations (of an n-element set) of height r (height(alpha) = |Im(alpha)|), 0 <= r < n.

Table of values

List of values