A061018 - cp's OEIS frontend

A061018 Triangle: a(n,m) = number of permutations of (1,2,...,n) with one or more fixed points in the m first positions.

n	a(n)
1	1
2	1
3	1
4	2
5	3
6	4
7	6
8	10
9	13
10	15
11	24
12	42
13	56
14	67
15	76
16	120
17	216
18	294
19	358
20	411
21	455
22	720
23	1320
24	1824
25	2250
26	2612
27	2921
28	3186
29	5040
30	9360
31	13080
32	16296
33	19086
34	21514
35	23633
36	25487
37	40320
38	75600
39	106560
40	133800
41	157824
42	179058
43	197864
44	214551
45	229384

[1, 1, 1, 2, 3, 4, 6, 10, 13, 15, 24, 42, 56, 67, 76, 120, 216, 294, 358, 411, 455, 720, 1320, 1824, 2250, 2612, 2921, 3186, 5040, 9360, 13080, 16296, 19086, 21514, 23633, 25487, 40320, 75600, 106560, 133800, 157824, 179058, 197864, 214551, 229384]

cp's OEIS Frontend

A061018 Triangle: a(n,m) = number of permutations of (1,2,...,n) with one or more fixed points in the m first positions.

Table of values

List of values