A229130 - cp's OEIS frontend

A229130 Number of permutations i_0, i_1, ..., i_n of 0, 1, ..., n with i_0 = 0 and i_n = n such that the n+1 numbers i_0^2+i_1, i_1^2+i_2, ..., i_{n-1}^2+i_n, i_n^2+i_0 are all relatively prime to both n-1 and n+1.

n	a(n)
1	1
2	0
3	1
4	1
5	0
6	6
7	3
8	42
9	68
10	2794
11	0
12	5311604
13	478
14	57009
15	2716452
16	10778632
17	207360
18	39187872956340
19	106144
20	26869397610
21	11775466120
22	22062519153360
23	559350576
24	29991180449906858400
25	257272815600
26	12675330087321600
27	52248156883498208

[1, 0, 1, 1, 0, 6, 3, 42, 68, 2794, 0, 5311604, 478, 57009, 2716452, 10778632, 207360, 39187872956340, 106144, 26869397610, 11775466120, 22062519153360, 559350576, 29991180449906858400, 257272815600, 12675330087321600, 52248156883498208]

cp's OEIS Frontend

A229130 Number of permutations i_0, i_1, ..., i_n of 0, 1, ..., n with i_0 = 0 and i_n = n such that the n+1 numbers i_0^2+i_1, i_1^2+i_2, ..., i_{n-1}^2+i_n, i_n^2+i_0 are all relatively prime to both n-1 and n+1.

Table of values

List of values