A276975 - cp's OEIS frontend

A276975 Number of permutations of [n] such that the minimal distance between elements of the same cycle equals one, a(1)=1 by convention.

n	a(n)
1	1
2	1
3	4
4	19
5	103
6	651
7	4702
8	38413
9	350559
10	3539511
11	39196758
12	472612883
13	6165080443
14	86526834271
15	1300282224846
16	20832761552453
17	354515666646827
18	6386139146435035
19	121406489336263622
20	2429193186525638435
21	51030147426536745655
22	1122952442325988152627

[1, 1, 4, 19, 103, 651, 4702, 38413, 350559, 3539511, 39196758, 472612883, 6165080443, 86526834271, 1300282224846, 20832761552453, 354515666646827, 6386139146435035, 121406489336263622, 2429193186525638435, 51030147426536745655, 1122952442325988152627]

cp's OEIS Frontend

A276975 Number of permutations of [n] such that the minimal distance between elements of the same cycle equals one, a(1)=1 by convention.

Table of values

List of values