A085780 - cp's OEIS frontend

A085780 Numbers that are a product of 2 triangular numbers.

n	a(n)
1	0
2	1
3	3
4	6
5	9
6	10
7	15
8	18
9	21
10	28
11	30
12	36
13	45
14	55
15	60
16	63
17	66
18	78
19	84
20	90
21	91
22	100
23	105
24	108
25	120
26	126
27	135
28	136
29	150
30	153
31	165
32	168
33	171
34	190
35	198
36	210
37	216
38	225
39	231
40	234
41	253
42	270
43	273
44	276
45	280
46	300
47	315
48	325
49	330
50	351
51	360
52	378
53	396
54	406
55	408
56	420
57	435
58	441

[0, 1, 3, 6, 9, 10, 15, 18, 21, 28, 30, 36, 45, 55, 60, 63, 66, 78, 84, 90, 91, 100, 105, 108, 120, 126, 135, 136, 150, 153, 165, 168, 171, 190, 198, 210, 216, 225, 231, 234, 253, 270, 273, 276, 280, 300, 315, 325, 330, 351, 360, 378, 396, 406, 408, 420, 435, 441]

cp's OEIS Frontend

A085780 Numbers that are a product of 2 triangular numbers.

Table of values

List of values

n	a(n)
1	0
2	1
3	3
4	6
5	9
6	10
7	15
8	18
9	21
10	28
11	30
12	36
13	45
14	55
15	60
16	63
17	66
18	78
19	84
20	90
21	91
22	100
23	105
24	108
25	120
26	126
27	135
28	136
29	150
30	153
31	165
32	168
33	171
34	190
35	198
36	210
37	216
38	225
39	231
40	234
41	253
42	270
43	273
44	276
45	280
46	300
47	315
48	325
49	330
50	351
51	360
52	378
53	396
54	406
55	408
56	420
57	435
58	441

n	a(n)
1	0
2	1
3	3
4	6
5	9
6	10
7	15
8	18
9	21
10	28
11	30
12	36
13	45
14	55
15	60
16	63
17	66
18	78
19	84
20	90
21	91
22	100
23	105
24	108
25	120
26	126
27	135
28	136
29	150
30	153
31	165
32	168
33	171
34	190
35	198
36	210
37	216
38	225
39	231
40	234
41	253
42	270
43	273
44	276
45	280
46	300
47	315
48	325
49	330
50	351
51	360
52	378
53	396
54	406
55	408
56	420
57	435
58	441

n	a(n)
1	0
2	1
3	3
4	6
5	9
6	10
7	15
8	18
9	21
10	28
11	30
12	36
13	45
14	55
15	60
16	63
17	66
18	78
19	84
20	90
21	91
22	100
23	105
24	108
25	120
26	126
27	135
28	136
29	150
30	153
31	165
32	168
33	171
34	190
35	198
36	210
37	216
38	225
39	231
40	234
41	253
42	270
43	273
44	276
45	280
46	300
47	315
48	325
49	330
50	351
51	360
52	378
53	396
54	406
55	408
56	420
57	435
58	441