A180196 - cp's OEIS frontend

A180196 Triangle read by rows: T(n,k) is the number of permutations of [n] that have k isolated entries (0 <= k <= n).

n	a(n)
0	1
1	0
2	1
3	1
4	0
5	1
6	1
7	2
8	0
9	3
10	2
11	2
12	9
13	0
14	11
15	3
16	11
17	9
18	44
19	0
20	53
21	7
22	20
23	75
24	44
25	265
26	0
27	309
28	14
29	73
30	141
31	574
32	265
33	1854
34	0
35	2119
36	35
37	170
38	737
39	1104
40	4900
41	1854
42	14833
43	0
44	16687
45	81
46	576
47	1863
48	7814
49	9535
50	46353
51	14833
52	133496
53	0
54	148329
55	216
56	1556
57	8154
58	20704
59	88335
60	90852
61	482069
62	133496
63	1334961
64	0
65	1468457

[1, 0, 1, 1, 0, 1, 1, 2, 0, 3, 2, 2, 9, 0, 11, 3, 11, 9, 44, 0, 53, 7, 20, 75, 44, 265, 0, 309, 14, 73, 141, 574, 265, 1854, 0, 2119, 35, 170, 737, 1104, 4900, 1854, 14833, 0, 16687, 81, 576, 1863, 7814, 9535, 46353, 14833, 133496, 0, 148329, 216, 1556, 8154, 20704, 88335, 90852, 482069, 133496, 1334961, 0, 1468457]

cp's OEIS Frontend

A180196 Triangle read by rows: T(n,k) is the number of permutations of [n] that have k isolated entries (0 <= k <= n).

Table of values

List of values