A286944 - cp's OEIS frontend

A286944 Number of ways to write n as x^2 + 15y^2 + z(3z+1)/2, where x and y are nonnegative integers and z is an integer.

n	a(n)
0	1
1	2
2	2
3	1
4	1
5	2
6	2
7	1
8	1
9	2
10	1
11	2
12	1
13	1
14	1
15	2
16	6
17	3
18	2
19	2
20	2
21	4
22	2
23	3
24	3
25	2
26	5
27	3
28	2
29	1
30	3
31	6
32	2
33	1
34	1
35	2
36	4
37	3
38	4
39	2
40	3
41	5
42	3
43	2
44	2
45	2
46	2
47	2
48	1
49	2
50	3
51	7
52	3
53	2
54	2
55	3
56	4
57	2
58	3
59	2
60	3
61	4
62	4
63	2
64	5
65	5
66	9
67	3
68	1
69	4
70	3
71	8
72	2
73	4
74	2
75	4
76	9
77	3
78	2
79	5
80	2

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

cp's OEIS Frontend

A286944 Number of ways to write n as x^2 + 15y^2 + z(3z+1)/2, where x and y are nonnegative integers and z is an integer.

Table of values

List of values

n	a(n)
0	1
1	2
2	2
3	1
4	1
5	2
6	2
7	1
8	1
9	2
10	1
11	2
12	1
13	1
14	1
15	2
16	6
17	3
18	2
19	2
20	2
21	4
22	2
23	3
24	3
25	2
26	5
27	3
28	2
29	1
30	3
31	6
32	2
33	1
34	1
35	2
36	4
37	3
38	4
39	2
40	3
41	5
42	3
43	2
44	2
45	2
46	2
47	2
48	1
49	2
50	3
51	7
52	3
53	2
54	2
55	3
56	4
57	2
58	3
59	2
60	3
61	4
62	4
63	2
64	5
65	5
66	9
67	3
68	1
69	4
70	3
71	8
72	2
73	4
74	2
75	4
76	9
77	3
78	2
79	5
80	2

n	a(n)
0	1
1	2
2	2
3	1
4	1
5	2
6	2
7	1
8	1
9	2
10	1
11	2
12	1
13	1
14	1
15	2
16	6
17	3
18	2
19	2
20	2
21	4
22	2
23	3
24	3
25	2
26	5
27	3
28	2
29	1
30	3
31	6
32	2
33	1
34	1
35	2
36	4
37	3
38	4
39	2
40	3
41	5
42	3
43	2
44	2
45	2
46	2
47	2
48	1
49	2
50	3
51	7
52	3
53	2
54	2
55	3
56	4
57	2
58	3
59	2
60	3
61	4
62	4
63	2
64	5
65	5
66	9
67	3
68	1
69	4
70	3
71	8
72	2
73	4
74	2
75	4
76	9
77	3
78	2
79	5
80	2

cp's OEIS Frontend

A286944 Number of ways to write n as x^2 + 15*y^2 + z*(3z+1)/2, where x and y are nonnegative integers and z is an integer.

Table of values

List of values

A286944 Number of ways to write n as x^2 + 15y^2 + z(3z+1)/2, where x and y are nonnegative integers and z is an integer.

n	a(n)
0	1
1	2
2	2
3	1
4	1
5	2
6	2
7	1
8	1
9	2
10	1
11	2
12	1
13	1
14	1
15	2
16	6
17	3
18	2
19	2
20	2
21	4
22	2
23	3
24	3
25	2
26	5
27	3
28	2
29	1
30	3
31	6
32	2
33	1
34	1
35	2
36	4
37	3
38	4
39	2
40	3
41	5
42	3
43	2
44	2
45	2
46	2
47	2
48	1
49	2
50	3
51	7
52	3
53	2
54	2
55	3
56	4
57	2
58	3
59	2
60	3
61	4
62	4
63	2
64	5
65	5
66	9
67	3
68	1
69	4
70	3
71	8
72	2
73	4
74	2
75	4
76	9
77	3
78	2
79	5
80	2