A343039 - cp's OEIS frontend

A343039 a(1) = 1, for n > 1, a(n) is the smallest positive integer for which a(n-1) + n + a(n) is a square.

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

[1, 1, 5, 7, 4, 6, 3, 5, 2, 4, 1, 3, 9, 2, 8, 1, 7, 11, 6, 10, 5, 9, 4, 8, 3, 7, 2, 6, 1, 5, 13, 4, 12, 3, 11, 2, 10, 1, 9, 15, 8, 14, 7, 13, 6, 12, 5, 11, 4, 10, 3, 9, 2, 8, 1, 7, 17, 6, 16, 5, 15, 4, 14, 3, 13, 2, 12, 1, 11]

cp's OEIS Frontend

A343039 a(1) = 1, for n > 1, a(n) is the smallest positive integer for which a(n-1) + n + a(n) is a square.

Table of values

List of values

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

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

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