A204920 - cp's OEIS frontend

A204920 a(n) = p(n)^2 - q(n)^2, where (p(n)^2, q(n)^2) is the least pair of squared primes for which n divides p(n)^2 - q(n)^2.

n	a(n)
1	5
2	16
3	21
4	16
5	5
6	24
7	21
8	16
9	45
10	40
11	165
12	24
13	117
14	112
15	45
16	16
17	357
18	72
19	285
20	40
21	21
22	264
23	552
24	24
25	525
26	312
27	837
28	112
29	957
30	120
31	837
32	96
33	165
34	408
35	280
36	72
37	888
38	912
39	117
40	40
41	1845
42	168
43	1677
44	264
45	45
46	552
47	1128
48	96
49	2205
50	600
51	357
52	312
53	1272
54	432

[5, 16, 21, 16, 5, 24, 21, 16, 45, 40, 165, 24, 117, 112, 45, 16, 357, 72, 285, 40, 21, 264, 552, 24, 525, 312, 837, 112, 957, 120, 837, 96, 165, 408, 280, 72, 888, 912, 117, 40, 1845, 168, 1677, 264, 45, 552, 1128, 96, 2205, 600, 357, 312, 1272, 432]

cp's OEIS Frontend

A204920 a(n) = p(n)^2 - q(n)^2, where (p(n)^2, q(n)^2) is the least pair of squared primes for which n divides p(n)^2 - q(n)^2.

Table of values

List of values