A306800 - cp's OEIS frontend

A306800 Square array whose entry A(n,k) is the number of endofunctions on a set of size n with preimage constraint {0,1,...,k}, for n >= 0, k >= 0, read by descending antidiagonals.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	1
8	2
9	0
10	1
11	1
12	4
13	6
14	0
15	1
16	1
17	4
18	24
19	24
20	0
21	1
22	1
23	4
24	27
25	204
26	120
27	0
28	1
29	1
30	4
31	27
32	252
33	2220
34	720
35	0
36	1
37	1
38	4
39	27
40	256
41	3020
42	29520
43	5040
44	0
45	1
46	1
47	4
48	27
49	256
50	3120
51	44220
52	463680
53	40320
54	0
55	1
56	1
57	4
58	27
59	256
60	3125
61	46470
62	765030
63	8401680
64	362880
65	0

[1, 1, 0, 1, 1, 0, 1, 1, 2, 0, 1, 1, 4, 6, 0, 1, 1, 4, 24, 24, 0, 1, 1, 4, 27, 204, 120, 0, 1, 1, 4, 27, 252, 2220, 720, 0, 1, 1, 4, 27, 256, 3020, 29520, 5040, 0, 1, 1, 4, 27, 256, 3120, 44220, 463680, 40320, 0, 1, 1, 4, 27, 256, 3125, 46470, 765030, 8401680, 362880, 0]

cp's OEIS Frontend

A306800 Square array whose entry A(n,k) is the number of endofunctions on a set of size n with preimage constraint {0,1,...,k}, for n >= 0, k >= 0, read by descending antidiagonals.

Table of values

List of values