A186699 - cp's OEIS frontend

A186699 Numbers n such that there are n numbers in arithmetic progression whose squares sum to a perfect square.

n	a(n)
1	1
2	2
3	4
4	9
5	11
6	16
7	23
8	24
9	25
10	26
11	33
12	36
13	47
14	49
15	50
16	52
17	59
18	64
19	73
20	74
21	81
22	88
23	96
24	97
25	100
26	107
27	121
28	122
29	144
30	146
31	148
32	169
33	177
34	184
35	191
36	193
37	194
38	196
39	218
40	225
41	239
42	241
43	242
44	244
45	249
46	256
47	276
48	289
49	292
50	297
51	299
52	311
53	312
54	313
55	324
56	337
57	338

[1, 2, 4, 9, 11, 16, 23, 24, 25, 26, 33, 36, 47, 49, 50, 52, 59, 64, 73, 74, 81, 88, 96, 97, 100, 107, 121, 122, 144, 146, 148, 169, 177, 184, 191, 193, 194, 196, 218, 225, 239, 241, 242, 244, 249, 256, 276, 289, 292, 297, 299, 311, 312, 313, 324, 337, 338]

cp's OEIS Frontend

A186699 Numbers n such that there are n numbers in arithmetic progression whose squares sum to a perfect square.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	9
5	11
6	16
7	23
8	24
9	25
10	26
11	33
12	36
13	47
14	49
15	50
16	52
17	59
18	64
19	73
20	74
21	81
22	88
23	96
24	97
25	100
26	107
27	121
28	122
29	144
30	146
31	148
32	169
33	177
34	184
35	191
36	193
37	194
38	196
39	218
40	225
41	239
42	241
43	242
44	244
45	249
46	256
47	276
48	289
49	292
50	297
51	299
52	311
53	312
54	313
55	324
56	337
57	338

n	a(n)
1	1
2	2
3	4
4	9
5	11
6	16
7	23
8	24
9	25
10	26
11	33
12	36
13	47
14	49
15	50
16	52
17	59
18	64
19	73
20	74
21	81
22	88
23	96
24	97
25	100
26	107
27	121
28	122
29	144
30	146
31	148
32	169
33	177
34	184
35	191
36	193
37	194
38	196
39	218
40	225
41	239
42	241
43	242
44	244
45	249
46	256
47	276
48	289
49	292
50	297
51	299
52	311
53	312
54	313
55	324
56	337
57	338

n	a(n)
1	1
2	2
3	4
4	9
5	11
6	16
7	23
8	24
9	25
10	26
11	33
12	36
13	47
14	49
15	50
16	52
17	59
18	64
19	73
20	74
21	81
22	88
23	96
24	97
25	100
26	107
27	121
28	122
29	144
30	146
31	148
32	169
33	177
34	184
35	191
36	193
37	194
38	196
39	218
40	225
41	239
42	241
43	242
44	244
45	249
46	256
47	276
48	289
49	292
50	297
51	299
52	311
53	312
54	313
55	324
56	337
57	338