A048126 - cp's OEIS frontend

A048126 Becomes prime or 4 after exactly 4 iterations of f(x) = sum of prime factors of x.

n	a(n)
1	26
2	33
3	39
4	44
5	49
6	51
7	55
8	65
9	66
10	70
11	77
12	78
13	84
14	91
15	92
16	95
17	98
18	100
19	105
20	110
21	112
22	114
23	119
24	120
25	125
26	126
27	128
28	129
29	130
30	132
31	135
32	140
33	143
34	144
35	150
36	154
37	156
38	160
39	162
40	168
41	170
42	180
43	189
44	192
45	196
46	200
47	204
48	205
49	216
50	217
51	220
52	225
53	240
54	242
55	243

[26, 33, 39, 44, 49, 51, 55, 65, 66, 70, 77, 78, 84, 91, 92, 95, 98, 100, 105, 110, 112, 114, 119, 120, 125, 126, 128, 129, 130, 132, 135, 140, 143, 144, 150, 154, 156, 160, 162, 168, 170, 180, 189, 192, 196, 200, 204, 205, 216, 217, 220, 225, 240, 242, 243]

cp's OEIS Frontend

A048126 Becomes prime or 4 after exactly 4 iterations of f(x) = sum of prime factors of x.

Table of values

List of values

n	a(n)
1	26
2	33
3	39
4	44
5	49
6	51
7	55
8	65
9	66
10	70
11	77
12	78
13	84
14	91
15	92
16	95
17	98
18	100
19	105
20	110
21	112
22	114
23	119
24	120
25	125
26	126
27	128
28	129
29	130
30	132
31	135
32	140
33	143
34	144
35	150
36	154
37	156
38	160
39	162
40	168
41	170
42	180
43	189
44	192
45	196
46	200
47	204
48	205
49	216
50	217
51	220
52	225
53	240
54	242
55	243

n	a(n)
1	26
2	33
3	39
4	44
5	49
6	51
7	55
8	65
9	66
10	70
11	77
12	78
13	84
14	91
15	92
16	95
17	98
18	100
19	105
20	110
21	112
22	114
23	119
24	120
25	125
26	126
27	128
28	129
29	130
30	132
31	135
32	140
33	143
34	144
35	150
36	154
37	156
38	160
39	162
40	168
41	170
42	180
43	189
44	192
45	196
46	200
47	204
48	205
49	216
50	217
51	220
52	225
53	240
54	242
55	243

n	a(n)
1	26
2	33
3	39
4	44
5	49
6	51
7	55
8	65
9	66
10	70
11	77
12	78
13	84
14	91
15	92
16	95
17	98
18	100
19	105
20	110
21	112
22	114
23	119
24	120
25	125
26	126
27	128
28	129
29	130
30	132
31	135
32	140
33	143
34	144
35	150
36	154
37	156
38	160
39	162
40	168
41	170
42	180
43	189
44	192
45	196
46	200
47	204
48	205
49	216
50	217
51	220
52	225
53	240
54	242
55	243