A321610 - cp's OEIS frontend

A321610 Number of permutations tau of {1,...,n} such that k^2 + tau(k)^2 is prime for every k = 1,...,n.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	4
7	0
8	16
9	4
10	144
11	64
12	81
13	256
14	5184
15	1600
16	25600
17	8100
18	183184
19	108900
20	5924356
21	342225
22	9066121
23	11356900
24	106853569
25	105698961
26	16119349444
27	1419933124
28	69792129124
29	14251584400
30	613950602500
31	304388337796
32	25042678198756
33	10080904401936
34	1179245283899881
35	1045903153861476
36	31082438574307129

[1, 1, 1, 1, 1, 4, 0, 16, 4, 144, 64, 81, 256, 5184, 1600, 25600, 8100, 183184, 108900, 5924356, 342225, 9066121, 11356900, 106853569, 105698961, 16119349444, 1419933124, 69792129124, 14251584400, 613950602500, 304388337796, 25042678198756, 10080904401936, 1179245283899881, 1045903153861476, 31082438574307129]

cp's OEIS Frontend

A321610 Number of permutations tau of {1,...,n} such that k^2 + tau(k)^2 is prime for every k = 1,...,n.

Table of values

List of values