A385664 - cp's OEIS frontend

A385664 Numbers y such that there is at least one x with 2 <= x < y, x^2 == y (mod sopfr(y)) and y^2 == x (mod sopfr(x)), where sopfr = A001414.

n	a(n)
1	4
2	6
3	9
4	16
5	21
6	25
7	27
8	36
9	46
10	48
11	49
12	52
13	56
14	60
15	64
16	72
17	81
18	84
19	90
20	100
21	102
22	104
23	108
24	120
25	121
26	126
27	128
28	135
29	141
30	144
31	150
32	156
33	160
34	162
35	166
36	169
37	174
38	176
39	180
40	196
41	204
42	207
43	216
44	220
45	225
46	231
47	237
48	238
49	240
50	244
51	245
52	246
53	248
54	253
55	256
56	261
57	264
58	276
59	280
60	286
61	288
62	289
63	294
64	301

[4, 6, 9, 16, 21, 25, 27, 36, 46, 48, 49, 52, 56, 60, 64, 72, 81, 84, 90, 100, 102, 104, 108, 120, 121, 126, 128, 135, 141, 144, 150, 156, 160, 162, 166, 169, 174, 176, 180, 196, 204, 207, 216, 220, 225, 231, 237, 238, 240, 244, 245, 246, 248, 253, 256, 261, 264, 276, 280, 286, 288, 289, 294, 301]

cp's OEIS Frontend

A385664 Numbers y such that there is at least one x with 2 <= x < y, x^2 == y (mod sopfr(y)) and y^2 == x (mod sopfr(x)), where sopfr = A001414.

Table of values

List of values

n	a(n)
1	4
2	6
3	9
4	16
5	21
6	25
7	27
8	36
9	46
10	48
11	49
12	52
13	56
14	60
15	64
16	72
17	81
18	84
19	90
20	100
21	102
22	104
23	108
24	120
25	121
26	126
27	128
28	135
29	141
30	144
31	150
32	156
33	160
34	162
35	166
36	169
37	174
38	176
39	180
40	196
41	204
42	207
43	216
44	220
45	225
46	231
47	237
48	238
49	240
50	244
51	245
52	246
53	248
54	253
55	256
56	261
57	264
58	276
59	280
60	286
61	288
62	289
63	294
64	301

n	a(n)
1	4
2	6
3	9
4	16
5	21
6	25
7	27
8	36
9	46
10	48
11	49
12	52
13	56
14	60
15	64
16	72
17	81
18	84
19	90
20	100
21	102
22	104
23	108
24	120
25	121
26	126
27	128
28	135
29	141
30	144
31	150
32	156
33	160
34	162
35	166
36	169
37	174
38	176
39	180
40	196
41	204
42	207
43	216
44	220
45	225
46	231
47	237
48	238
49	240
50	244
51	245
52	246
53	248
54	253
55	256
56	261
57	264
58	276
59	280
60	286
61	288
62	289
63	294
64	301

n	a(n)
1	4
2	6
3	9
4	16
5	21
6	25
7	27
8	36
9	46
10	48
11	49
12	52
13	56
14	60
15	64
16	72
17	81
18	84
19	90
20	100
21	102
22	104
23	108
24	120
25	121
26	126
27	128
28	135
29	141
30	144
31	150
32	156
33	160
34	162
35	166
36	169
37	174
38	176
39	180
40	196
41	204
42	207
43	216
44	220
45	225
46	231
47	237
48	238
49	240
50	244
51	245
52	246
53	248
54	253
55	256
56	261
57	264
58	276
59	280
60	286
61	288
62	289
63	294
64	301