A256587 - cp's OEIS frontend

A256587 Number of ways to write n = r + s + t, where r,s,t are elements of the set {floor(k*(k+1)/4): k = 1,2,3,...} with s odd and r <= s <= t.

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	2
8	2
9	3
10	2
11	4
12	2
13	4
14	2
15	5
16	3
17	4
18	3
19	3
20	5
21	3
22	4
23	2
24	6
25	2
26	4
27	1
28	6
29	2
30	4
31	1
32	4
33	2
34	3
35	3
36	2
37	3
38	1
39	3
40	2
41	4
42	1
43	3
44	1
45	3
46	2
47	4
48	1
49	3
50	1
51	3
52	1
53	4
54	2
55	4
56	1
57	3
58	2
59	3
60	3
61	3
62	3
63	2
64	3
65	2
66	5
67	4
68	3
69	3
70	4
71	3
72	5
73	5
74	4
75	3
76	5
77	3
78	6
79	6
80	5
81	4
82	7
83	3
84	6
85	4
86	7
87	4
88	8
89	3
90	7
91	5
92	6
93	7
94	6
95	5
96	6
97	6
98	6
99	7
100	8

[0, 1, 1, 1, 1, 2, 2, 2, 3, 2, 4, 2, 4, 2, 5, 3, 4, 3, 3, 5, 3, 4, 2, 6, 2, 4, 1, 6, 2, 4, 1, 4, 2, 3, 3, 2, 3, 1, 3, 2, 4, 1, 3, 1, 3, 2, 4, 1, 3, 1, 3, 1, 4, 2, 4, 1, 3, 2, 3, 3, 3, 3, 2, 3, 2, 5, 4, 3, 3, 4, 3, 5, 5, 4, 3, 5, 3, 6, 6, 5, 4, 7, 3, 6, 4, 7, 4, 8, 3, 7, 5, 6, 7, 6, 5, 6, 6, 6, 7, 8]

cp's OEIS Frontend

A256587 Number of ways to write n = r + s + t, where r,s,t are elements of the set {floor(k*(k+1)/4): k = 1,2,3,...} with s odd and r <= s <= t.

Table of values

List of values

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	2
8	2
9	3
10	2
11	4
12	2
13	4
14	2
15	5
16	3
17	4
18	3
19	3
20	5
21	3
22	4
23	2
24	6
25	2
26	4
27	1
28	6
29	2
30	4
31	1
32	4
33	2
34	3
35	3
36	2
37	3
38	1
39	3
40	2
41	4
42	1
43	3
44	1
45	3
46	2
47	4
48	1
49	3
50	1
51	3
52	1
53	4
54	2
55	4
56	1
57	3
58	2
59	3
60	3
61	3
62	3
63	2
64	3
65	2
66	5
67	4
68	3
69	3
70	4
71	3
72	5
73	5
74	4
75	3
76	5
77	3
78	6
79	6
80	5
81	4
82	7
83	3
84	6
85	4
86	7
87	4
88	8
89	3
90	7
91	5
92	6
93	7
94	6
95	5
96	6
97	6
98	6
99	7
100	8

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	2
8	2
9	3
10	2
11	4
12	2
13	4
14	2
15	5
16	3
17	4
18	3
19	3
20	5
21	3
22	4
23	2
24	6
25	2
26	4
27	1
28	6
29	2
30	4
31	1
32	4
33	2
34	3
35	3
36	2
37	3
38	1
39	3
40	2
41	4
42	1
43	3
44	1
45	3
46	2
47	4
48	1
49	3
50	1
51	3
52	1
53	4
54	2
55	4
56	1
57	3
58	2
59	3
60	3
61	3
62	3
63	2
64	3
65	2
66	5
67	4
68	3
69	3
70	4
71	3
72	5
73	5
74	4
75	3
76	5
77	3
78	6
79	6
80	5
81	4
82	7
83	3
84	6
85	4
86	7
87	4
88	8
89	3
90	7
91	5
92	6
93	7
94	6
95	5
96	6
97	6
98	6
99	7
100	8

n	a(n)
1	0
2	1
3	1
4	1
5	1
6	2
7	2
8	2
9	3
10	2
11	4
12	2
13	4
14	2
15	5
16	3
17	4
18	3
19	3
20	5
21	3
22	4
23	2
24	6
25	2
26	4
27	1
28	6
29	2
30	4
31	1
32	4
33	2
34	3
35	3
36	2
37	3
38	1
39	3
40	2
41	4
42	1
43	3
44	1
45	3
46	2
47	4
48	1
49	3
50	1
51	3
52	1
53	4
54	2
55	4
56	1
57	3
58	2
59	3
60	3
61	3
62	3
63	2
64	3
65	2
66	5
67	4
68	3
69	3
70	4
71	3
72	5
73	5
74	4
75	3
76	5
77	3
78	6
79	6
80	5
81	4
82	7
83	3
84	6
85	4
86	7
87	4
88	8
89	3
90	7
91	5
92	6
93	7
94	6
95	5
96	6
97	6
98	6
99	7
100	8