A262944 - cp's OEIS frontend

A262944 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 pentagonal number.

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	3
7	4
8	3
9	1
10	3
11	5
12	3
13	2
14	2
15	5
16	5
17	3
18	3
19	5
20	5
21	3
22	6
23	6
24	3
25	3
26	8
27	6
28	5
29	5
30	3
31	7
32	5
33	5
34	3
35	4
36	4
37	8
38	9
39	3
40	5
41	7
42	6
43	3
44	5
45	5
46	7
47	5
48	3
49	4
50	5
51	6
52	6
53	9
54	4
55	5
56	7
57	7
58	5
59	4
60	4
61	7
62	6
63	1
64	5
65	5
66	7
67	7
68	7
69	1
70	6
71	10
72	8
73	6
74	3
75	4
76	3
77	6
78	4
79	6
80	9
81	5
82	7
83	9
84	3
85	5
86	8
87	9
88	8
89	3
90	3
91	11
92	10
93	6
94	6
95	8
96	12
97	5
98	6
99	4
100	7

[1, 2, 2, 2, 2, 3, 4, 3, 1, 3, 5, 3, 2, 2, 5, 5, 3, 3, 5, 5, 3, 6, 6, 3, 3, 8, 6, 5, 5, 3, 7, 5, 5, 3, 4, 4, 8, 9, 3, 5, 7, 6, 3, 5, 5, 7, 5, 3, 4, 5, 6, 6, 9, 4, 5, 7, 7, 5, 4, 4, 7, 6, 1, 5, 5, 7, 7, 7, 1, 6, 10, 8, 6, 3, 4, 3, 6, 4, 6, 9, 5, 7, 9, 3, 5, 8, 9, 8, 3, 3, 11, 10, 6, 6, 8, 12, 5, 6, 4, 7]

cp's OEIS Frontend

A262944 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 pentagonal number.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	3
7	4
8	3
9	1
10	3
11	5
12	3
13	2
14	2
15	5
16	5
17	3
18	3
19	5
20	5
21	3
22	6
23	6
24	3
25	3
26	8
27	6
28	5
29	5
30	3
31	7
32	5
33	5
34	3
35	4
36	4
37	8
38	9
39	3
40	5
41	7
42	6
43	3
44	5
45	5
46	7
47	5
48	3
49	4
50	5
51	6
52	6
53	9
54	4
55	5
56	7
57	7
58	5
59	4
60	4
61	7
62	6
63	1
64	5
65	5
66	7
67	7
68	7
69	1
70	6
71	10
72	8
73	6
74	3
75	4
76	3
77	6
78	4
79	6
80	9
81	5
82	7
83	9
84	3
85	5
86	8
87	9
88	8
89	3
90	3
91	11
92	10
93	6
94	6
95	8
96	12
97	5
98	6
99	4
100	7

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	3
7	4
8	3
9	1
10	3
11	5
12	3
13	2
14	2
15	5
16	5
17	3
18	3
19	5
20	5
21	3
22	6
23	6
24	3
25	3
26	8
27	6
28	5
29	5
30	3
31	7
32	5
33	5
34	3
35	4
36	4
37	8
38	9
39	3
40	5
41	7
42	6
43	3
44	5
45	5
46	7
47	5
48	3
49	4
50	5
51	6
52	6
53	9
54	4
55	5
56	7
57	7
58	5
59	4
60	4
61	7
62	6
63	1
64	5
65	5
66	7
67	7
68	7
69	1
70	6
71	10
72	8
73	6
74	3
75	4
76	3
77	6
78	4
79	6
80	9
81	5
82	7
83	9
84	3
85	5
86	8
87	9
88	8
89	3
90	3
91	11
92	10
93	6
94	6
95	8
96	12
97	5
98	6
99	4
100	7

n	a(n)
1	1
2	2
3	2
4	2
5	2
6	3
7	4
8	3
9	1
10	3
11	5
12	3
13	2
14	2
15	5
16	5
17	3
18	3
19	5
20	5
21	3
22	6
23	6
24	3
25	3
26	8
27	6
28	5
29	5
30	3
31	7
32	5
33	5
34	3
35	4
36	4
37	8
38	9
39	3
40	5
41	7
42	6
43	3
44	5
45	5
46	7
47	5
48	3
49	4
50	5
51	6
52	6
53	9
54	4
55	5
56	7
57	7
58	5
59	4
60	4
61	7
62	6
63	1
64	5
65	5
66	7
67	7
68	7
69	1
70	6
71	10
72	8
73	6
74	3
75	4
76	3
77	6
78	4
79	6
80	9
81	5
82	7
83	9
84	3
85	5
86	8
87	9
88	8
89	3
90	3
91	11
92	10
93	6
94	6
95	8
96	12
97	5
98	6
99	4
100	7