A274243 - cp's OEIS frontend

A274243 Numbers n for which the sum of the odd numbers in the Collatz (3x+1) iteration of n is prime.

n	a(n)
1	11
2	13
3	22
4	26
5	44
6	52
7	53
8	67
9	88
10	104
11	105
12	106
13	113
14	121
15	131
16	134
17	165
18	176
19	187
20	208
21	210
22	211
23	212
24	226
25	227
26	231
27	242
28	243
29	257
30	261
31	262
32	268
33	273
34	289
35	291
36	293
37	325
38	329
39	330
40	352
41	373
42	374
43	416
44	419
45	420
46	422
47	424
48	431
49	447
50	452
51	454
52	461
53	462
54	473

[11, 13, 22, 26, 44, 52, 53, 67, 88, 104, 105, 106, 113, 121, 131, 134, 165, 176, 187, 208, 210, 211, 212, 226, 227, 231, 242, 243, 257, 261, 262, 268, 273, 289, 291, 293, 325, 329, 330, 352, 373, 374, 416, 419, 420, 422, 424, 431, 447, 452, 454, 461, 462, 473]

cp's OEIS Frontend

A274243 Numbers n for which the sum of the odd numbers in the Collatz (3x+1) iteration of n is prime.

Table of values

List of values

n	a(n)
1	11
2	13
3	22
4	26
5	44
6	52
7	53
8	67
9	88
10	104
11	105
12	106
13	113
14	121
15	131
16	134
17	165
18	176
19	187
20	208
21	210
22	211
23	212
24	226
25	227
26	231
27	242
28	243
29	257
30	261
31	262
32	268
33	273
34	289
35	291
36	293
37	325
38	329
39	330
40	352
41	373
42	374
43	416
44	419
45	420
46	422
47	424
48	431
49	447
50	452
51	454
52	461
53	462
54	473

n	a(n)
1	11
2	13
3	22
4	26
5	44
6	52
7	53
8	67
9	88
10	104
11	105
12	106
13	113
14	121
15	131
16	134
17	165
18	176
19	187
20	208
21	210
22	211
23	212
24	226
25	227
26	231
27	242
28	243
29	257
30	261
31	262
32	268
33	273
34	289
35	291
36	293
37	325
38	329
39	330
40	352
41	373
42	374
43	416
44	419
45	420
46	422
47	424
48	431
49	447
50	452
51	454
52	461
53	462
54	473

n	a(n)
1	11
2	13
3	22
4	26
5	44
6	52
7	53
8	67
9	88
10	104
11	105
12	106
13	113
14	121
15	131
16	134
17	165
18	176
19	187
20	208
21	210
22	211
23	212
24	226
25	227
26	231
27	242
28	243
29	257
30	261
31	262
32	268
33	273
34	289
35	291
36	293
37	325
38	329
39	330
40	352
41	373
42	374
43	416
44	419
45	420
46	422
47	424
48	431
49	447
50	452
51	454
52	461
53	462
54	473