A308641 - cp's OEIS frontend

A308641 Number of ways to write n as (2^a5^b)^2 + c(3c+1)/2 + d(3d+1)/2, where a and b are nonnegative integers, and c and d are integers with c(3c+1)/2 <= d*(3d+1)/2.

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

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

cp's OEIS Frontend

A308641 Number of ways to write n as (2^a5^b)^2 + c(3c+1)/2 + d(3d+1)/2, where a and b are nonnegative integers, and c and d are integers with c(3c+1)/2 <= d*(3d+1)/2.

Table of values

List of values

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

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

cp's OEIS Frontend

A308641 Number of ways to write n as (2^a*5^b)^2 + c*(3c+1)/2 + d*(3d+1)/2, where a and b are nonnegative integers, and c and d are integers with c*(3c+1)/2 <= d*(3d+1)/2.

Table of values

List of values

A308641 Number of ways to write n as (2^a5^b)^2 + c(3c+1)/2 + d(3d+1)/2, where a and b are nonnegative integers, and c and d are integers with c(3c+1)/2 <= d*(3d+1)/2.

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