A321611 - cp's OEIS frontend

A321611 Number of permutations tau of {1,...,n} such that k^4 + tau(k)^4 is prime for every k = 1,...,n.

n	a(n)
1	1
2	1
3	1
4	4
5	4
6	4
7	4
8	64
9	16
10	144
11	144
12	0
13	144
14	144
15	289
16	4356
17	2916
18	22500
19	79524
20	1887876
21	313600
22	3459600
23	2985984
24	50069776
25	32353344
26	2056803904
27	237591396
28	11713732900
29	10265337124
30	342040164964
31	30744816964
32	2507750953744
33	378640854244
34	53517915572836
35	7415600385600
36	230030730231696

[1, 1, 1, 4, 4, 4, 4, 64, 16, 144, 144, 0, 144, 144, 289, 4356, 2916, 22500, 79524, 1887876, 313600, 3459600, 2985984, 50069776, 32353344, 2056803904, 237591396, 11713732900, 10265337124, 342040164964, 30744816964, 2507750953744, 378640854244, 53517915572836, 7415600385600, 230030730231696]

cp's OEIS Frontend

A321611 Number of permutations tau of {1,...,n} such that k^4 + tau(k)^4 is prime for every k = 1,...,n.

Table of values

List of values