A227782 - cp's OEIS frontend

A227782 Stufe of Q(sqrt(-n)): least number of squares which add to -1 in the field Q(sqrt(-n)).

n	a(n)
1	1
2	2
3	2
4	1
5	2
6	2
7	4
8	2
9	1
10	2
11	2
12	2
13	2
14	2
15	4
16	1
17	2
18	2
19	2
20	2
21	2
22	2
23	4
24	2
25	1
26	2
27	2
28	4
29	2
30	2
31	4
32	2
33	2
34	2
35	2
36	1
37	2
38	2
39	4
40	2
41	2
42	2
43	2
44	2
45	2
46	2
47	4
48	2
49	1
50	2
51	2
52	2
53	2
54	2
55	4
56	2
57	2
58	2
59	2
60	4
61	2
62	2
63	4
64	1
65	2
66	2
67	2
68	2
69	2
70	2
71	4
72	2
73	2
74	2
75	2
76	2
77	2
78	2
79	4
80	2
81	1
82	2
83	2
84	2
85	2
86	2
87	4
88	2
89	2
90	2
91	2
92	4
93	2

[1, 2, 2, 1, 2, 2, 4, 2, 1, 2, 2, 2, 2, 2, 4, 1, 2, 2, 2, 2, 2, 2, 4, 2, 1, 2, 2, 4, 2, 2, 4, 2, 2, 2, 2, 1, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 4, 2, 1, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 4, 2, 2, 4, 1, 2, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 2, 2, 2, 4, 2, 1, 2, 2, 2, 2, 2, 4, 2, 2, 2, 2, 4, 2]

cp's OEIS Frontend

A227782 Stufe of Q(sqrt(-n)): least number of squares which add to -1 in the field Q(sqrt(-n)).

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	1
5	2
6	2
7	4
8	2
9	1
10	2
11	2
12	2
13	2
14	2
15	4
16	1
17	2
18	2
19	2
20	2
21	2
22	2
23	4
24	2
25	1
26	2
27	2
28	4
29	2
30	2
31	4
32	2
33	2
34	2
35	2
36	1
37	2
38	2
39	4
40	2
41	2
42	2
43	2
44	2
45	2
46	2
47	4
48	2
49	1
50	2
51	2
52	2
53	2
54	2
55	4
56	2
57	2
58	2
59	2
60	4
61	2
62	2
63	4
64	1
65	2
66	2
67	2
68	2
69	2
70	2
71	4
72	2
73	2
74	2
75	2
76	2
77	2
78	2
79	4
80	2
81	1
82	2
83	2
84	2
85	2
86	2
87	4
88	2
89	2
90	2
91	2
92	4
93	2

n	a(n)
1	1
2	2
3	2
4	1
5	2
6	2
7	4
8	2
9	1
10	2
11	2
12	2
13	2
14	2
15	4
16	1
17	2
18	2
19	2
20	2
21	2
22	2
23	4
24	2
25	1
26	2
27	2
28	4
29	2
30	2
31	4
32	2
33	2
34	2
35	2
36	1
37	2
38	2
39	4
40	2
41	2
42	2
43	2
44	2
45	2
46	2
47	4
48	2
49	1
50	2
51	2
52	2
53	2
54	2
55	4
56	2
57	2
58	2
59	2
60	4
61	2
62	2
63	4
64	1
65	2
66	2
67	2
68	2
69	2
70	2
71	4
72	2
73	2
74	2
75	2
76	2
77	2
78	2
79	4
80	2
81	1
82	2
83	2
84	2
85	2
86	2
87	4
88	2
89	2
90	2
91	2
92	4
93	2

n	a(n)
1	1
2	2
3	2
4	1
5	2
6	2
7	4
8	2
9	1
10	2
11	2
12	2
13	2
14	2
15	4
16	1
17	2
18	2
19	2
20	2
21	2
22	2
23	4
24	2
25	1
26	2
27	2
28	4
29	2
30	2
31	4
32	2
33	2
34	2
35	2
36	1
37	2
38	2
39	4
40	2
41	2
42	2
43	2
44	2
45	2
46	2
47	4
48	2
49	1
50	2
51	2
52	2
53	2
54	2
55	4
56	2
57	2
58	2
59	2
60	4
61	2
62	2
63	4
64	1
65	2
66	2
67	2
68	2
69	2
70	2
71	4
72	2
73	2
74	2
75	2
76	2
77	2
78	2
79	4
80	2
81	1
82	2
83	2
84	2
85	2
86	2
87	4
88	2
89	2
90	2
91	2
92	4
93	2