A108815 - cp's OEIS frontend

A108815 Indices of triangular numbers which are products of 3 primes.

n	a(n)
1	7
2	9
3	11
4	12
5	14
6	17
7	18
8	19
9	21
10	25
11	28
12	29
13	30
14	33
15	34
16	38
17	41
18	42
19	43
20	52
21	57
22	66
23	67
24	70
25	78
26	85
27	86
28	93
29	94
30	97
31	101
32	102
33	109
34	113
35	118
36	121
37	122
38	130
39	133
40	137
41	138
42	141
43	142
44	145
45	148
46	158
47	163
48	172
49	173
50	177
51	181
52	190
53	201
54	202
55	205
56	211
57	213
58	214
59	217
60	218

[7, 9, 11, 12, 14, 17, 18, 19, 21, 25, 28, 29, 30, 33, 34, 38, 41, 42, 43, 52, 57, 66, 67, 70, 78, 85, 86, 93, 94, 97, 101, 102, 109, 113, 118, 121, 122, 130, 133, 137, 138, 141, 142, 145, 148, 158, 163, 172, 173, 177, 181, 190, 201, 202, 205, 211, 213, 214, 217, 218]

cp's OEIS Frontend

A108815 Indices of triangular numbers which are products of 3 primes.

Table of values

List of values

n	a(n)
1	7
2	9
3	11
4	12
5	14
6	17
7	18
8	19
9	21
10	25
11	28
12	29
13	30
14	33
15	34
16	38
17	41
18	42
19	43
20	52
21	57
22	66
23	67
24	70
25	78
26	85
27	86
28	93
29	94
30	97
31	101
32	102
33	109
34	113
35	118
36	121
37	122
38	130
39	133
40	137
41	138
42	141
43	142
44	145
45	148
46	158
47	163
48	172
49	173
50	177
51	181
52	190
53	201
54	202
55	205
56	211
57	213
58	214
59	217
60	218

n	a(n)
1	7
2	9
3	11
4	12
5	14
6	17
7	18
8	19
9	21
10	25
11	28
12	29
13	30
14	33
15	34
16	38
17	41
18	42
19	43
20	52
21	57
22	66
23	67
24	70
25	78
26	85
27	86
28	93
29	94
30	97
31	101
32	102
33	109
34	113
35	118
36	121
37	122
38	130
39	133
40	137
41	138
42	141
43	142
44	145
45	148
46	158
47	163
48	172
49	173
50	177
51	181
52	190
53	201
54	202
55	205
56	211
57	213
58	214
59	217
60	218

n	a(n)
1	7
2	9
3	11
4	12
5	14
6	17
7	18
8	19
9	21
10	25
11	28
12	29
13	30
14	33
15	34
16	38
17	41
18	42
19	43
20	52
21	57
22	66
23	67
24	70
25	78
26	85
27	86
28	93
29	94
30	97
31	101
32	102
33	109
34	113
35	118
36	121
37	122
38	130
39	133
40	137
41	138
42	141
43	142
44	145
45	148
46	158
47	163
48	172
49	173
50	177
51	181
52	190
53	201
54	202
55	205
56	211
57	213
58	214
59	217
60	218