A115228 - cp's OEIS frontend

A115228 Nonsquarefree numbers n such that 2n+1 is also nonsquarefree (A013929).

n	a(n)
1	4
2	12
3	24
4	40
5	49
6	60
7	76
8	84
9	112
10	121
11	144
12	148
13	162
14	171
15	175
16	180
17	184
18	212
19	220
20	256
21	264
22	292
23	312
24	328
25	364
26	387
27	400
28	412
29	416
30	420
31	423
32	436
33	472
34	480
35	490
36	508
37	512
38	544
39	580
40	612
41	616
42	625
43	637
44	652
45	684
46	688
47	712
48	722
49	724
50	760
51	796
52	808
53	812

[4, 12, 24, 40, 49, 60, 76, 84, 112, 121, 144, 148, 162, 171, 175, 180, 184, 212, 220, 256, 264, 292, 312, 328, 364, 387, 400, 412, 416, 420, 423, 436, 472, 480, 490, 508, 512, 544, 580, 612, 616, 625, 637, 652, 684, 688, 712, 722, 724, 760, 796, 808, 812]

cp's OEIS Frontend

A115228 Nonsquarefree numbers n such that 2n+1 is also nonsquarefree (A013929).

Table of values

List of values

n	a(n)
1	4
2	12
3	24
4	40
5	49
6	60
7	76
8	84
9	112
10	121
11	144
12	148
13	162
14	171
15	175
16	180
17	184
18	212
19	220
20	256
21	264
22	292
23	312
24	328
25	364
26	387
27	400
28	412
29	416
30	420
31	423
32	436
33	472
34	480
35	490
36	508
37	512
38	544
39	580
40	612
41	616
42	625
43	637
44	652
45	684
46	688
47	712
48	722
49	724
50	760
51	796
52	808
53	812

n	a(n)
1	4
2	12
3	24
4	40
5	49
6	60
7	76
8	84
9	112
10	121
11	144
12	148
13	162
14	171
15	175
16	180
17	184
18	212
19	220
20	256
21	264
22	292
23	312
24	328
25	364
26	387
27	400
28	412
29	416
30	420
31	423
32	436
33	472
34	480
35	490
36	508
37	512
38	544
39	580
40	612
41	616
42	625
43	637
44	652
45	684
46	688
47	712
48	722
49	724
50	760
51	796
52	808
53	812

n	a(n)
1	4
2	12
3	24
4	40
5	49
6	60
7	76
8	84
9	112
10	121
11	144
12	148
13	162
14	171
15	175
16	180
17	184
18	212
19	220
20	256
21	264
22	292
23	312
24	328
25	364
26	387
27	400
28	412
29	416
30	420
31	423
32	436
33	472
34	480
35	490
36	508
37	512
38	544
39	580
40	612
41	616
42	625
43	637
44	652
45	684
46	688
47	712
48	722
49	724
50	760
51	796
52	808
53	812