A334014 - cp's OEIS frontend

A334014 Array read by antidiagonals: T(n,k) is the number of functions f: X->Y, where X is a subset of Y, |X| = n, |Y| = n+k, such that for every x in X, f(f(x)) != x.

n	a(n)
0	1
1	1
2	0
3	1
4	1
5	0
6	1
7	2
8	3
9	2
10	1
11	3
12	8
13	18
14	30
15	1
16	4
17	15
18	52
19	163
20	444
21	1
22	5
23	24
24	110
25	478
26	1950
27	7360
28	1
29	6
30	35
31	198
32	1083
33	5706
34	28821
35	138690
36	1
37	7
38	48
39	322
40	2110
41	13482
42	83824
43	505876
44	2954364
45	1
46	8
47	63
48	488
49	3715
50	27768
51	203569
52	1461944
53	10270569
54	70469000
55	1
56	9
57	80
58	702
59	6078
60	51894
61	436656
62	3618540
63	29510268
64	236644092
65	1864204416
66	1
67	10
68	99
69	970
70	9403
71	90150
72	854485
73	8003950
74	74058105
75	676549450
76	6098971555
77	54224221050

[1, 1, 0, 1, 1, 0, 1, 2, 3, 2, 1, 3, 8, 18, 30, 1, 4, 15, 52, 163, 444, 1, 5, 24, 110, 478, 1950, 7360, 1, 6, 35, 198, 1083, 5706, 28821, 138690, 1, 7, 48, 322, 2110, 13482, 83824, 505876, 2954364, 1, 8, 63, 488, 3715, 27768, 203569, 1461944, 10270569, 70469000, 1, 9, 80, 702, 6078, 51894, 436656, 3618540, 29510268, 236644092, 1864204416, 1, 10, 99, 970, 9403, 90150, 854485, 8003950, 74058105, 676549450, 6098971555, 54224221050]

cp's OEIS Frontend

A334014 Array read by antidiagonals: T(n,k) is the number of functions f: X->Y, where X is a subset of Y, |X| = n, |Y| = n+k, such that for every x in X, f(f(x)) != x.

Table of values

List of values