A307303 - cp's OEIS frontend

A307303 Triangle T(n, k) read as upwards antidiagonals of array A, where A(n, k) is the number of families (also called classes) of proper solutions of the Pell equation x^2 - D(n)*y^2 = -k, for k >= 1.

n	a(n)
1	1
2	0
3	1
4	1
5	1
6	0
7	0
8	0
9	1
10	0
11	0
12	1
13	0
14	0
15	0
16	0
17	0
18	0
19	2
20	0
21	0
22	1
23	0
24	2
25	0
26	1
27	0
28	2
29	0
30	0
31	0
32	0
33	2
34	0
35	0
36	0
37	0
38	1
39	0
40	1
41	0
42	1
43	0
44	0
45	0
46	1
47	0
48	0
49	0
50	0
51	2
52	0
53	0
54	0
55	0
56	0
57	0
58	1
59	0
60	0
61	0
62	1
63	0
64	0
65	0
66	0
67	0
68	0
69	2
70	0
71	0
72	2
73	2
74	0
75	0
76	0
77	2
78	0

[1, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0, 1, 0, 0, 0, 0, 0, 0, 2, 0, 0, 1, 0, 2, 0, 1, 0, 2, 0, 0, 0, 0, 2, 0, 0, 0, 0, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 2, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 2, 0, 0, 2, 2, 0, 0, 0, 2, 0]

cp's OEIS Frontend

A307303 Triangle T(n, k) read as upwards antidiagonals of array A, where A(n, k) is the number of families (also called classes) of proper solutions of the Pell equation x^2 - D(n)*y^2 = -k, for k >= 1.

Table of values

List of values

n	a(n)
1	1
2	0
3	1
4	1
5	1
6	0
7	0
8	0
9	1
10	0
11	0
12	1
13	0
14	0
15	0
16	0
17	0
18	0
19	2
20	0
21	0
22	1
23	0
24	2
25	0
26	1
27	0
28	2
29	0
30	0
31	0
32	0
33	2
34	0
35	0
36	0
37	0
38	1
39	0
40	1
41	0
42	1
43	0
44	0
45	0
46	1
47	0
48	0
49	0
50	0
51	2
52	0
53	0
54	0
55	0
56	0
57	0
58	1
59	0
60	0
61	0
62	1
63	0
64	0
65	0
66	0
67	0
68	0
69	2
70	0
71	0
72	2
73	2
74	0
75	0
76	0
77	2
78	0

n	a(n)
1	1
2	0
3	1
4	1
5	1
6	0
7	0
8	0
9	1
10	0
11	0
12	1
13	0
14	0
15	0
16	0
17	0
18	0
19	2
20	0
21	0
22	1
23	0
24	2
25	0
26	1
27	0
28	2
29	0
30	0
31	0
32	0
33	2
34	0
35	0
36	0
37	0
38	1
39	0
40	1
41	0
42	1
43	0
44	0
45	0
46	1
47	0
48	0
49	0
50	0
51	2
52	0
53	0
54	0
55	0
56	0
57	0
58	1
59	0
60	0
61	0
62	1
63	0
64	0
65	0
66	0
67	0
68	0
69	2
70	0
71	0
72	2
73	2
74	0
75	0
76	0
77	2
78	0

n	a(n)
1	1
2	0
3	1
4	1
5	1
6	0
7	0
8	0
9	1
10	0
11	0
12	1
13	0
14	0
15	0
16	0
17	0
18	0
19	2
20	0
21	0
22	1
23	0
24	2
25	0
26	1
27	0
28	2
29	0
30	0
31	0
32	0
33	2
34	0
35	0
36	0
37	0
38	1
39	0
40	1
41	0
42	1
43	0
44	0
45	0
46	1
47	0
48	0
49	0
50	0
51	2
52	0
53	0
54	0
55	0
56	0
57	0
58	1
59	0
60	0
61	0
62	1
63	0
64	0
65	0
66	0
67	0
68	0
69	2
70	0
71	0
72	2
73	2
74	0
75	0
76	0
77	2
78	0