A212849 - cp's OEIS frontend

A212849 Numbers whose sum of prime factors (counted with multiplicity) is a triangular number.

n	a(n)
1	1
2	3
3	8
4	9
5	21
6	25
7	26
8	30
9	32
10	36
11	38
12	44
13	68
14	86
15	105
16	106
17	112
18	115
19	125
20	126
21	138
22	150
23	155
24	160
25	164
26	178
27	180
28	186
29	187
30	192
31	195
32	203
33	206
34	208
35	216
36	231
37	234
38	243
39	266
40	275
41	290
42	299
43	302
44	305
45	323
46	330
47	338
48	343
49	348
50	352
51	365
52	366
53	380
54	396
55	404
56	413

[1, 3, 8, 9, 21, 25, 26, 30, 32, 36, 38, 44, 68, 86, 105, 106, 112, 115, 125, 126, 138, 150, 155, 160, 164, 178, 180, 186, 187, 192, 195, 203, 206, 208, 216, 231, 234, 243, 266, 275, 290, 299, 302, 305, 323, 330, 338, 343, 348, 352, 365, 366, 380, 396, 404, 413]

cp's OEIS Frontend

A212849 Numbers whose sum of prime factors (counted with multiplicity) is a triangular number.

Table of values

List of values

n	a(n)
1	1
2	3
3	8
4	9
5	21
6	25
7	26
8	30
9	32
10	36
11	38
12	44
13	68
14	86
15	105
16	106
17	112
18	115
19	125
20	126
21	138
22	150
23	155
24	160
25	164
26	178
27	180
28	186
29	187
30	192
31	195
32	203
33	206
34	208
35	216
36	231
37	234
38	243
39	266
40	275
41	290
42	299
43	302
44	305
45	323
46	330
47	338
48	343
49	348
50	352
51	365
52	366
53	380
54	396
55	404
56	413

n	a(n)
1	1
2	3
3	8
4	9
5	21
6	25
7	26
8	30
9	32
10	36
11	38
12	44
13	68
14	86
15	105
16	106
17	112
18	115
19	125
20	126
21	138
22	150
23	155
24	160
25	164
26	178
27	180
28	186
29	187
30	192
31	195
32	203
33	206
34	208
35	216
36	231
37	234
38	243
39	266
40	275
41	290
42	299
43	302
44	305
45	323
46	330
47	338
48	343
49	348
50	352
51	365
52	366
53	380
54	396
55	404
56	413

n	a(n)
1	1
2	3
3	8
4	9
5	21
6	25
7	26
8	30
9	32
10	36
11	38
12	44
13	68
14	86
15	105
16	106
17	112
18	115
19	125
20	126
21	138
22	150
23	155
24	160
25	164
26	178
27	180
28	186
29	187
30	192
31	195
32	203
33	206
34	208
35	216
36	231
37	234
38	243
39	266
40	275
41	290
42	299
43	302
44	305
45	323
46	330
47	338
48	343
49	348
50	352
51	365
52	366
53	380
54	396
55	404
56	413