A379483 - cp's OEIS frontend

A379483 a(n) is the number of trailing 1-bits in the binary representation of sigma(A003961(n^2)), where A003961 is fully multiplicative with a(prime(i)) = prime(i+1), and sigma is the sum of divisors function.

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

[1, 1, 5, 1, 1, 2, 1, 1, 1, 1, 3, 3, 2, 1, 3, 1, 1, 1, 1, 1, 2, 2, 3, 2, 1, 3, 2, 1, 1, 2, 7, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 5, 1, 7, 1, 2, 4, 4, 1, 1, 2, 2, 1, 4, 6, 1, 3, 1, 3, 4, 1, 2, 1, 1, 2, 1, 1, 1, 1, 1, 2, 1, 1, 7, 4, 1, 2, 1, 1, 1, 1, 1, 2, 2, 1, 1, 6, 2, 2, 1, 7, 4, 1, 2, 1, 2, 6, 1, 2, 1, 1, 3, 1, 6, 2]

cp's OEIS Frontend

A379483 a(n) is the number of trailing 1-bits in the binary representation of sigma(A003961(n^2)), where A003961 is fully multiplicative with a(prime(i)) = prime(i+1), and sigma is the sum of divisors function.

Table of values

List of values

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

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

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