A309332 - cp's OEIS frontend

A309332 Number of ways the n-th triangular number T(n) = A000217(n) can be written as the sum of two positive triangular numbers.

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	1
7	0
8	1
9	0
10	1
11	1
12	0
13	1
14	0
15	1
16	1
17	0
18	1
19	0
20	1
21	2
22	0
23	3
24	0
25	0
26	1
27	1
28	3
29	0
30	0
31	1
32	0
33	1
34	0
35	0
36	3
37	1
38	1
39	0
40	1
41	3
42	0
43	1
44	1
45	1
46	2
47	0
48	1
49	2
50	0
51	1
52	1
53	2
54	1
55	1
56	1
57	1
58	2
59	1
60	0
61	3
62	1
63	1
64	1
65	0
66	3
67	1
68	1
69	0
70	0
71	2
72	0
73	1
74	1
75	1
76	1
77	1
78	5
79	0
80	1
81	1
82	0
83	1
84	0
85	0
86	3
87	0
88	3
89	1
90	0
91	3
92	1
93	3
94	1
95	3
96	3
97	0
98	1
99	0
100	0
101	3
102	0
103	2
104	0
105	1

[0, 0, 1, 0, 0, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 1, 0, 1, 0, 1, 2, 0, 3, 0, 0, 1, 1, 3, 0, 0, 1, 0, 1, 0, 0, 3, 1, 1, 0, 1, 3, 0, 1, 1, 1, 2, 0, 1, 2, 0, 1, 1, 2, 1, 1, 1, 1, 2, 1, 0, 3, 1, 1, 1, 0, 3, 1, 1, 0, 0, 2, 0, 1, 1, 1, 1, 1, 5, 0, 1, 1, 0, 1, 0, 0, 3, 0, 3, 1, 0, 3, 1, 3, 1, 3, 3, 0, 1, 0, 0, 3, 0, 2, 0, 1]

cp's OEIS Frontend

A309332 Number of ways the n-th triangular number T(n) = A000217(n) can be written as the sum of two positive triangular numbers.

Table of values

List of values

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	1
7	0
8	1
9	0
10	1
11	1
12	0
13	1
14	0
15	1
16	1
17	0
18	1
19	0
20	1
21	2
22	0
23	3
24	0
25	0
26	1
27	1
28	3
29	0
30	0
31	1
32	0
33	1
34	0
35	0
36	3
37	1
38	1
39	0
40	1
41	3
42	0
43	1
44	1
45	1
46	2
47	0
48	1
49	2
50	0
51	1
52	1
53	2
54	1
55	1
56	1
57	1
58	2
59	1
60	0
61	3
62	1
63	1
64	1
65	0
66	3
67	1
68	1
69	0
70	0
71	2
72	0
73	1
74	1
75	1
76	1
77	1
78	5
79	0
80	1
81	1
82	0
83	1
84	0
85	0
86	3
87	0
88	3
89	1
90	0
91	3
92	1
93	3
94	1
95	3
96	3
97	0
98	1
99	0
100	0
101	3
102	0
103	2
104	0
105	1

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	1
7	0
8	1
9	0
10	1
11	1
12	0
13	1
14	0
15	1
16	1
17	0
18	1
19	0
20	1
21	2
22	0
23	3
24	0
25	0
26	1
27	1
28	3
29	0
30	0
31	1
32	0
33	1
34	0
35	0
36	3
37	1
38	1
39	0
40	1
41	3
42	0
43	1
44	1
45	1
46	2
47	0
48	1
49	2
50	0
51	1
52	1
53	2
54	1
55	1
56	1
57	1
58	2
59	1
60	0
61	3
62	1
63	1
64	1
65	0
66	3
67	1
68	1
69	0
70	0
71	2
72	0
73	1
74	1
75	1
76	1
77	1
78	5
79	0
80	1
81	1
82	0
83	1
84	0
85	0
86	3
87	0
88	3
89	1
90	0
91	3
92	1
93	3
94	1
95	3
96	3
97	0
98	1
99	0
100	0
101	3
102	0
103	2
104	0
105	1

n	a(n)
1	0
2	0
3	1
4	0
5	0
6	1
7	0
8	1
9	0
10	1
11	1
12	0
13	1
14	0
15	1
16	1
17	0
18	1
19	0
20	1
21	2
22	0
23	3
24	0
25	0
26	1
27	1
28	3
29	0
30	0
31	1
32	0
33	1
34	0
35	0
36	3
37	1
38	1
39	0
40	1
41	3
42	0
43	1
44	1
45	1
46	2
47	0
48	1
49	2
50	0
51	1
52	1
53	2
54	1
55	1
56	1
57	1
58	2
59	1
60	0
61	3
62	1
63	1
64	1
65	0
66	3
67	1
68	1
69	0
70	0
71	2
72	0
73	1
74	1
75	1
76	1
77	1
78	5
79	0
80	1
81	1
82	0
83	1
84	0
85	0
86	3
87	0
88	3
89	1
90	0
91	3
92	1
93	3
94	1
95	3
96	3
97	0
98	1
99	0
100	0
101	3
102	0
103	2
104	0
105	1