A380875 - cp's OEIS frontend

A380875 Indices of triangular numbers (A000217) which are also perimeters of integer-sided right triangles (A010814).

n	a(n)
1	8
2	15
3	20
4	23
5	24
6	27
7	32
8	35
9	39
10	44
11	47
12	48
13	51
14	55
15	56
16	59
17	60
18	63
19	64
20	68
21	71
22	72
23	75
24	76
25	79
26	80
27	84
28	87
29	91
30	92
31	95
32	96
33	99
34	104
35	111
36	112
37	115
38	116
39	119
40	120
41	123
42	124
43	128
44	132
45	135
46	139
47	140
48	143
49	144
50	147
51	152
52	155
53	159
54	160
55	164
56	167
57	168
58	171
59	175
60	176
61	179
62	180
63	183
64	184
65	187
66	188

[8, 15, 20, 23, 24, 27, 32, 35, 39, 44, 47, 48, 51, 55, 56, 59, 60, 63, 64, 68, 71, 72, 75, 76, 79, 80, 84, 87, 91, 92, 95, 96, 99, 104, 111, 112, 115, 116, 119, 120, 123, 124, 128, 132, 135, 139, 140, 143, 144, 147, 152, 155, 159, 160, 164, 167, 168, 171, 175, 176, 179, 180, 183, 184, 187, 188]

cp's OEIS Frontend

A380875 Indices of triangular numbers (A000217) which are also perimeters of integer-sided right triangles (A010814).

Table of values

List of values

n	a(n)
1	8
2	15
3	20
4	23
5	24
6	27
7	32
8	35
9	39
10	44
11	47
12	48
13	51
14	55
15	56
16	59
17	60
18	63
19	64
20	68
21	71
22	72
23	75
24	76
25	79
26	80
27	84
28	87
29	91
30	92
31	95
32	96
33	99
34	104
35	111
36	112
37	115
38	116
39	119
40	120
41	123
42	124
43	128
44	132
45	135
46	139
47	140
48	143
49	144
50	147
51	152
52	155
53	159
54	160
55	164
56	167
57	168
58	171
59	175
60	176
61	179
62	180
63	183
64	184
65	187
66	188

n	a(n)
1	8
2	15
3	20
4	23
5	24
6	27
7	32
8	35
9	39
10	44
11	47
12	48
13	51
14	55
15	56
16	59
17	60
18	63
19	64
20	68
21	71
22	72
23	75
24	76
25	79
26	80
27	84
28	87
29	91
30	92
31	95
32	96
33	99
34	104
35	111
36	112
37	115
38	116
39	119
40	120
41	123
42	124
43	128
44	132
45	135
46	139
47	140
48	143
49	144
50	147
51	152
52	155
53	159
54	160
55	164
56	167
57	168
58	171
59	175
60	176
61	179
62	180
63	183
64	184
65	187
66	188

n	a(n)
1	8
2	15
3	20
4	23
5	24
6	27
7	32
8	35
9	39
10	44
11	47
12	48
13	51
14	55
15	56
16	59
17	60
18	63
19	64
20	68
21	71
22	72
23	75
24	76
25	79
26	80
27	84
28	87
29	91
30	92
31	95
32	96
33	99
34	104
35	111
36	112
37	115
38	116
39	119
40	120
41	123
42	124
43	128
44	132
45	135
46	139
47	140
48	143
49	144
50	147
51	152
52	155
53	159
54	160
55	164
56	167
57	168
58	171
59	175
60	176
61	179
62	180
63	183
64	184
65	187
66	188