A303235 - cp's OEIS frontend

A303235 Number of ordered pairs (x, y) with 0 <= x <= y such that n - 2^x - 2^y can be written as the sum of two triangular numbers.

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	4
8	5
9	6
10	6
11	6
12	8
13	7
14	7
15	8
16	8
17	8
18	10
19	10
20	10
21	10
22	9
23	9
24	11
25	9
26	10
27	11
28	10
29	9
30	12
31	10
32	11
33	14
34	13
35	11
36	14
37	12
38	12
39	13
40	15
41	12
42	14
43	12
44	13
45	14
46	14
47	14
48	15
49	13
50	11
51	14
52	13
53	11
54	16
55	13
56	10
57	11
58	13
59	11
60	14

[0, 1, 2, 3, 4, 5, 4, 5, 6, 6, 6, 8, 7, 7, 8, 8, 8, 10, 10, 10, 10, 9, 9, 11, 9, 10, 11, 10, 9, 12, 10, 11, 14, 13, 11, 14, 12, 12, 13, 15, 12, 14, 12, 13, 14, 14, 14, 15, 13, 11, 14, 13, 11, 16, 13, 10, 11, 13, 11, 14]

cp's OEIS Frontend

A303235 Number of ordered pairs (x, y) with 0 <= x <= y such that n - 2^x - 2^y can be written as the sum of two triangular numbers.

Table of values

List of values

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	4
8	5
9	6
10	6
11	6
12	8
13	7
14	7
15	8
16	8
17	8
18	10
19	10
20	10
21	10
22	9
23	9
24	11
25	9
26	10
27	11
28	10
29	9
30	12
31	10
32	11
33	14
34	13
35	11
36	14
37	12
38	12
39	13
40	15
41	12
42	14
43	12
44	13
45	14
46	14
47	14
48	15
49	13
50	11
51	14
52	13
53	11
54	16
55	13
56	10
57	11
58	13
59	11
60	14

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	4
8	5
9	6
10	6
11	6
12	8
13	7
14	7
15	8
16	8
17	8
18	10
19	10
20	10
21	10
22	9
23	9
24	11
25	9
26	10
27	11
28	10
29	9
30	12
31	10
32	11
33	14
34	13
35	11
36	14
37	12
38	12
39	13
40	15
41	12
42	14
43	12
44	13
45	14
46	14
47	14
48	15
49	13
50	11
51	14
52	13
53	11
54	16
55	13
56	10
57	11
58	13
59	11
60	14

n	a(n)
1	0
2	1
3	2
4	3
5	4
6	5
7	4
8	5
9	6
10	6
11	6
12	8
13	7
14	7
15	8
16	8
17	8
18	10
19	10
20	10
21	10
22	9
23	9
24	11
25	9
26	10
27	11
28	10
29	9
30	12
31	10
32	11
33	14
34	13
35	11
36	14
37	12
38	12
39	13
40	15
41	12
42	14
43	12
44	13
45	14
46	14
47	14
48	15
49	13
50	11
51	14
52	13
53	11
54	16
55	13
56	10
57	11
58	13
59	11
60	14