A262956 - cp's OEIS frontend

A262956 Number of ordered pairs (x,y) with x >= 0 and y > 0 such that n - x^4 - y*(y+1)/2 is a square or a square minus 1.

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

[1, 2, 2, 3, 3, 3, 4, 2, 2, 5, 5, 3, 2, 3, 4, 4, 4, 5, 7, 5, 3, 6, 5, 3, 7, 8, 5, 4, 5, 7, 8, 6, 2, 4, 5, 5, 10, 7, 5, 7, 6, 4, 3, 5, 8, 10, 6, 2, 3, 5, 6, 10, 9, 5, 7, 6, 4, 4, 5, 6, 8, 5, 3, 8, 7, 5, 7, 5, 6, 11, 9, 5, 3, 5, 5, 4, 4, 3, 8, 9, 7, 10, 7, 5, 11, 10, 8, 5, 1]

cp's OEIS Frontend

A262956 Number of ordered pairs (x,y) with x >= 0 and y > 0 such that n - x^4 - y*(y+1)/2 is a square or a square minus 1.

Table of values

List of values

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

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

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