A077762 - cp's OEIS frontend

A077762 Number of ways of pairing the squares of the numbers 1 to n with the squares of the numbers n+1 to 2n such that each pair sums to a prime. Because an odd square must always be added to an even square to obtain a prime, this sequence is the product of A077763 and A077764.

n	a(n)
1	1
2	1
3	0
4	1
5	2
6	0
7	1
8	1
9	4
10	8
11	0
12	8
13	42
14	28
15	140
16	616
17	836
18	180
19	1416
20	2542
21	10960
22	96048
23	242204
24	367587
25	923949
26	1145430
27	2622420
28	19081728
29	245846500
30	2934255428
31	6725485476
32	7722272142
33	26106311490
34	114470819132
35	331909473776
36	330258090272
37	4585951400436
38	37021666628450

[1, 1, 0, 1, 2, 0, 1, 1, 4, 8, 0, 8, 42, 28, 140, 616, 836, 180, 1416, 2542, 10960, 96048, 242204, 367587, 923949, 1145430, 2622420, 19081728, 245846500, 2934255428, 6725485476, 7722272142, 26106311490, 114470819132, 331909473776, 330258090272, 4585951400436, 37021666628450]

cp's OEIS Frontend

A077762 Number of ways of pairing the squares of the numbers 1 to n with the squares of the numbers n+1 to 2n such that each pair sums to a prime. Because an odd square must always be added to an even square to obtain a prime, this sequence is the product of A077763 and A077764.

Table of values

List of values