A131781 - cp's OEIS frontend

A131781 2*A046854 - A000012 (signed by columns + - + -, ...).

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

[1, 3, 1, 1, 3, 1, 3, 3, 3, 1, 1, 5, 5, 3, 1, 3, 5, 7, 7, 3, 1, 1, 7, 11, 9, 9, 3, 1, 3, 7, 13, 19, 11, 11, 3, 1, 1, 9, 19, 21, 29, 13, 13, 3, 1, 3, 9, 21, 39, 31, 41, 15, 15, 3, 1]

cp's OEIS Frontend

A131781 2*A046854 - A000012 (signed by columns + - + -, ...).

Table of values

List of values

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

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

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