A224928 - cp's OEIS frontend

A224928 Numbers of pairs {x, y} such that x <= y and triangular(x) + triangular(y) = 2^n.

n	a(n)
0	1
1	1
2	1
3	0
4	2
5	0
6	1
7	0
8	3
9	0
10	2
11	0
12	4
13	0
14	1
15	0
16	8
17	0
18	2
19	0
20	4
21	0
22	4
23	0
24	8
25	0
26	2
27	0
28	24
29	0
30	2
31	0
32	8
33	0
34	8
35	0
36	8
37	0
38	2
39	0
40	32
41	0
42	4
43	0
44	16
45	0
46	4
47	0
48	32
49	0
50	4
51	0
52	32
53	0
54	4
55	0
56	4
57	0
58	8
59	0
60	16
61	0
62	2
63	0
64	32
65	0
66	6
67	0
68	48
69	0
70	16
71	0
72	16
73	0
74	8
75	0
76	384
77	0
78	4
79	0
80	16
81	0
82	16
83	0
84	16
85	0
86	8
87	0
88	768
89	0
90	2
91	0
92	8
93	0
94	4
95	0
96	32
97	0
98	32
99	0
100	256

[1, 1, 1, 0, 2, 0, 1, 0, 3, 0, 2, 0, 4, 0, 1, 0, 8, 0, 2, 0, 4, 0, 4, 0, 8, 0, 2, 0, 24, 0, 2, 0, 8, 0, 8, 0, 8, 0, 2, 0, 32, 0, 4, 0, 16, 0, 4, 0, 32, 0, 4, 0, 32, 0, 4, 0, 4, 0, 8, 0, 16, 0, 2, 0, 32, 0, 6, 0, 48, 0, 16, 0, 16, 0, 8, 0, 384, 0, 4, 0, 16, 0, 16, 0, 16, 0, 8, 0, 768, 0, 2, 0, 8, 0, 4, 0, 32, 0, 32, 0, 256]

cp's OEIS Frontend

A224928 Numbers of pairs {x, y} such that x <= y and triangular(x) + triangular(y) = 2^n.

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	0
4	2
5	0
6	1
7	0
8	3
9	0
10	2
11	0
12	4
13	0
14	1
15	0
16	8
17	0
18	2
19	0
20	4
21	0
22	4
23	0
24	8
25	0
26	2
27	0
28	24
29	0
30	2
31	0
32	8
33	0
34	8
35	0
36	8
37	0
38	2
39	0
40	32
41	0
42	4
43	0
44	16
45	0
46	4
47	0
48	32
49	0
50	4
51	0
52	32
53	0
54	4
55	0
56	4
57	0
58	8
59	0
60	16
61	0
62	2
63	0
64	32
65	0
66	6
67	0
68	48
69	0
70	16
71	0
72	16
73	0
74	8
75	0
76	384
77	0
78	4
79	0
80	16
81	0
82	16
83	0
84	16
85	0
86	8
87	0
88	768
89	0
90	2
91	0
92	8
93	0
94	4
95	0
96	32
97	0
98	32
99	0
100	256

n	a(n)
0	1
1	1
2	1
3	0
4	2
5	0
6	1
7	0
8	3
9	0
10	2
11	0
12	4
13	0
14	1
15	0
16	8
17	0
18	2
19	0
20	4
21	0
22	4
23	0
24	8
25	0
26	2
27	0
28	24
29	0
30	2
31	0
32	8
33	0
34	8
35	0
36	8
37	0
38	2
39	0
40	32
41	0
42	4
43	0
44	16
45	0
46	4
47	0
48	32
49	0
50	4
51	0
52	32
53	0
54	4
55	0
56	4
57	0
58	8
59	0
60	16
61	0
62	2
63	0
64	32
65	0
66	6
67	0
68	48
69	0
70	16
71	0
72	16
73	0
74	8
75	0
76	384
77	0
78	4
79	0
80	16
81	0
82	16
83	0
84	16
85	0
86	8
87	0
88	768
89	0
90	2
91	0
92	8
93	0
94	4
95	0
96	32
97	0
98	32
99	0
100	256

n	a(n)
0	1
1	1
2	1
3	0
4	2
5	0
6	1
7	0
8	3
9	0
10	2
11	0
12	4
13	0
14	1
15	0
16	8
17	0
18	2
19	0
20	4
21	0
22	4
23	0
24	8
25	0
26	2
27	0
28	24
29	0
30	2
31	0
32	8
33	0
34	8
35	0
36	8
37	0
38	2
39	0
40	32
41	0
42	4
43	0
44	16
45	0
46	4
47	0
48	32
49	0
50	4
51	0
52	32
53	0
54	4
55	0
56	4
57	0
58	8
59	0
60	16
61	0
62	2
63	0
64	32
65	0
66	6
67	0
68	48
69	0
70	16
71	0
72	16
73	0
74	8
75	0
76	384
77	0
78	4
79	0
80	16
81	0
82	16
83	0
84	16
85	0
86	8
87	0
88	768
89	0
90	2
91	0
92	8
93	0
94	4
95	0
96	32
97	0
98	32
99	0
100	256