A053603 - cp's OEIS frontend

A053603 Number of ways to write n as an ordered sum of two nonzero triangular numbers.

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

[0, 0, 1, 0, 2, 0, 1, 2, 0, 2, 0, 2, 1, 2, 0, 0, 4, 0, 2, 0, 1, 2, 2, 0, 2, 2, 0, 2, 0, 2, 1, 4, 0, 0, 2, 0, 2, 2, 2, 2, 0, 0, 3, 2, 0, 0, 4, 0, 2, 2, 0, 4, 0, 0, 0, 2, 3, 2, 2, 0, 2, 2, 0, 0, 2, 2, 2, 2, 0, 2, 2, 0, 3, 2, 0, 0, 4, 0, 0, 2, 0, 6, 0, 2, 2, 0, 0, 2, 2, 0, 1, 2, 2]

cp's OEIS Frontend

A053603 Number of ways to write n as an ordered sum of two nonzero triangular numbers.

Table of values

List of values

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

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

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