A379222 - cp's OEIS frontend

A379222 Number of trailing 1-bits in the binary representation of the sum of the divisors of the n-th odd square: a(n) = sigma((2*n-1)^2).

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

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

cp's OEIS Frontend

A379222 Number of trailing 1-bits in the binary representation of the sum of the divisors of the n-th odd square: a(n) = sigma((2*n-1)^2).

Table of values

List of values

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

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

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