A336931 - cp's OEIS frontend

A336931 Difference between the 2-adic valuation of A003973(n) [= the sum of divisors of the prime shifted n] and the 2-adic valuation of the number of divisors of n.

n	a(n)
1	0
2	1
3	0
4	0
5	2
6	1
7	1
8	1
9	0
10	3
11	0
12	0
13	0
14	2
15	2
16	0
17	1
18	1
19	2
20	2
21	1
22	1
23	0
24	1
25	0
26	1
27	0
28	1
29	4
30	3
31	0
32	1
33	0
34	2
35	3
36	0
37	0
38	3
39	0
40	3
41	1
42	2
43	3
44	0
45	2
46	1
47	0
48	0
49	0
50	1
51	1
52	0
53	1
54	1
55	2
56	2
57	2
58	5
59	0
60	2
61	1
62	1
63	1
64	0
65	2
66	1
67	2
68	1
69	0
70	4
71	0
72	1
73	3
74	1
75	0
76	2
77	1
78	1
79	1
80	2
81	0
82	2
83	0
84	1
85	3
86	4
87	4
88	1
89	0
90	3
91	1
92	0
93	0
94	1
95	4
96	1
97	0
98	1
99	0
100	0
101	2
102	2
103	1
104	1
105	3

[0, 1, 0, 0, 2, 1, 1, 1, 0, 3, 0, 0, 0, 2, 2, 0, 1, 1, 2, 2, 1, 1, 0, 1, 0, 1, 0, 1, 4, 3, 0, 1, 0, 2, 3, 0, 0, 3, 0, 3, 1, 2, 3, 0, 2, 1, 0, 0, 0, 1, 1, 0, 1, 1, 2, 2, 2, 5, 0, 2, 1, 1, 1, 0, 2, 1, 2, 1, 0, 4, 0, 1, 3, 1, 0, 2, 1, 1, 1, 2, 0, 2, 0, 1, 3, 4, 4, 1, 0, 3, 1, 0, 0, 1, 4, 1, 0, 1, 0, 0, 2, 2, 1, 1, 3]

cp's OEIS Frontend

A336931 Difference between the 2-adic valuation of A003973(n) [= the sum of divisors of the prime shifted n] and the 2-adic valuation of the number of divisors of n.

Table of values

List of values

n	a(n)
1	0
2	1
3	0
4	0
5	2
6	1
7	1
8	1
9	0
10	3
11	0
12	0
13	0
14	2
15	2
16	0
17	1
18	1
19	2
20	2
21	1
22	1
23	0
24	1
25	0
26	1
27	0
28	1
29	4
30	3
31	0
32	1
33	0
34	2
35	3
36	0
37	0
38	3
39	0
40	3
41	1
42	2
43	3
44	0
45	2
46	1
47	0
48	0
49	0
50	1
51	1
52	0
53	1
54	1
55	2
56	2
57	2
58	5
59	0
60	2
61	1
62	1
63	1
64	0
65	2
66	1
67	2
68	1
69	0
70	4
71	0
72	1
73	3
74	1
75	0
76	2
77	1
78	1
79	1
80	2
81	0
82	2
83	0
84	1
85	3
86	4
87	4
88	1
89	0
90	3
91	1
92	0
93	0
94	1
95	4
96	1
97	0
98	1
99	0
100	0
101	2
102	2
103	1
104	1
105	3

n	a(n)
1	0
2	1
3	0
4	0
5	2
6	1
7	1
8	1
9	0
10	3
11	0
12	0
13	0
14	2
15	2
16	0
17	1
18	1
19	2
20	2
21	1
22	1
23	0
24	1
25	0
26	1
27	0
28	1
29	4
30	3
31	0
32	1
33	0
34	2
35	3
36	0
37	0
38	3
39	0
40	3
41	1
42	2
43	3
44	0
45	2
46	1
47	0
48	0
49	0
50	1
51	1
52	0
53	1
54	1
55	2
56	2
57	2
58	5
59	0
60	2
61	1
62	1
63	1
64	0
65	2
66	1
67	2
68	1
69	0
70	4
71	0
72	1
73	3
74	1
75	0
76	2
77	1
78	1
79	1
80	2
81	0
82	2
83	0
84	1
85	3
86	4
87	4
88	1
89	0
90	3
91	1
92	0
93	0
94	1
95	4
96	1
97	0
98	1
99	0
100	0
101	2
102	2
103	1
104	1
105	3

n	a(n)
1	0
2	1
3	0
4	0
5	2
6	1
7	1
8	1
9	0
10	3
11	0
12	0
13	0
14	2
15	2
16	0
17	1
18	1
19	2
20	2
21	1
22	1
23	0
24	1
25	0
26	1
27	0
28	1
29	4
30	3
31	0
32	1
33	0
34	2
35	3
36	0
37	0
38	3
39	0
40	3
41	1
42	2
43	3
44	0
45	2
46	1
47	0
48	0
49	0
50	1
51	1
52	0
53	1
54	1
55	2
56	2
57	2
58	5
59	0
60	2
61	1
62	1
63	1
64	0
65	2
66	1
67	2
68	1
69	0
70	4
71	0
72	1
73	3
74	1
75	0
76	2
77	1
78	1
79	1
80	2
81	0
82	2
83	0
84	1
85	3
86	4
87	4
88	1
89	0
90	3
91	1
92	0
93	0
94	1
95	4
96	1
97	0
98	1
99	0
100	0
101	2
102	2
103	1
104	1
105	3