A273185 - cp's OEIS frontend

A273185 Start with a(0) = 0. Thereafter a(n) is the number of m < n with the property that a(m) + n is a perfect square.

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

[0, 1, 0, 1, 2, 0, 0, 1, 3, 4, 0, 0, 1, 1, 1, 6, 6, 0, 0, 2, 0, 1, 1, 2, 8, 9, 0, 1, 1, 0, 2, 0, 1, 1, 4, 12, 12, 2, 0, 0, 1, 1, 0, 2, 0, 2, 1, 7, 15, 17, 0, 0, 2, 0, 0, 1, 1, 1, 2, 0, 2, 1, 10, 19, 22, 0, 1, 0, 0, 2, 0, 1, 1, 1, 1, 2, 0, 2, 2, 14]

cp's OEIS Frontend

A273185 Start with a(0) = 0. Thereafter a(n) is the number of m < n with the property that a(m) + n is a perfect square.

Table of values

List of values

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

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

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