A287616 - cp's OEIS frontend

A287616 Number of ways to write n as x(x+1)/2 + y(3y+1)/2 + z(5z+1)/2 with x,y,z nonnegative integers.

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

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

cp's OEIS Frontend

A287616 Number of ways to write n as x(x+1)/2 + y(3y+1)/2 + z(5z+1)/2 with x,y,z nonnegative integers.

Table of values

List of values

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

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

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