A309776 - cp's OEIS frontend

A309776 Form a triangle: first row is n in base 2, next row is sums of pairs of adjacent digits of previous row, repeat until get a single number which is a(n).

n	a(n)
0	0
1	1
2	1
3	2
4	1
5	2
6	3
7	4
8	1
9	2
10	4
11	5
12	4
13	5
14	7
15	8
16	1
17	2
18	5
19	6
20	7
21	8
22	11
23	12
24	5
25	6
26	9
27	10
28	11
29	12
30	15
31	16
32	1
33	2
34	6
35	7
36	11
37	12
38	16
39	17
40	11
41	12
42	16
43	17
44	21
45	22
46	26
47	27
48	6
49	7
50	11
51	12
52	16
53	17
54	21
55	22
56	16
57	17
58	21
59	22
60	26
61	27
62	31
63	32
64	1
65	2
66	7
67	8
68	16
69	17
70	22
71	23
72	21
73	22

[0, 1, 1, 2, 1, 2, 3, 4, 1, 2, 4, 5, 4, 5, 7, 8, 1, 2, 5, 6, 7, 8, 11, 12, 5, 6, 9, 10, 11, 12, 15, 16, 1, 2, 6, 7, 11, 12, 16, 17, 11, 12, 16, 17, 21, 22, 26, 27, 6, 7, 11, 12, 16, 17, 21, 22, 16, 17, 21, 22, 26, 27, 31, 32, 1, 2, 7, 8, 16, 17, 22, 23, 21, 22]

cp's OEIS Frontend

A309776 Form a triangle: first row is n in base 2, next row is sums of pairs of adjacent digits of previous row, repeat until get a single number which is a(n).

Table of values

List of values

n	a(n)
0	0
1	1
2	1
3	2
4	1
5	2
6	3
7	4
8	1
9	2
10	4
11	5
12	4
13	5
14	7
15	8
16	1
17	2
18	5
19	6
20	7
21	8
22	11
23	12
24	5
25	6
26	9
27	10
28	11
29	12
30	15
31	16
32	1
33	2
34	6
35	7
36	11
37	12
38	16
39	17
40	11
41	12
42	16
43	17
44	21
45	22
46	26
47	27
48	6
49	7
50	11
51	12
52	16
53	17
54	21
55	22
56	16
57	17
58	21
59	22
60	26
61	27
62	31
63	32
64	1
65	2
66	7
67	8
68	16
69	17
70	22
71	23
72	21
73	22

n	a(n)
0	0
1	1
2	1
3	2
4	1
5	2
6	3
7	4
8	1
9	2
10	4
11	5
12	4
13	5
14	7
15	8
16	1
17	2
18	5
19	6
20	7
21	8
22	11
23	12
24	5
25	6
26	9
27	10
28	11
29	12
30	15
31	16
32	1
33	2
34	6
35	7
36	11
37	12
38	16
39	17
40	11
41	12
42	16
43	17
44	21
45	22
46	26
47	27
48	6
49	7
50	11
51	12
52	16
53	17
54	21
55	22
56	16
57	17
58	21
59	22
60	26
61	27
62	31
63	32
64	1
65	2
66	7
67	8
68	16
69	17
70	22
71	23
72	21
73	22

n	a(n)
0	0
1	1
2	1
3	2
4	1
5	2
6	3
7	4
8	1
9	2
10	4
11	5
12	4
13	5
14	7
15	8
16	1
17	2
18	5
19	6
20	7
21	8
22	11
23	12
24	5
25	6
26	9
27	10
28	11
29	12
30	15
31	16
32	1
33	2
34	6
35	7
36	11
37	12
38	16
39	17
40	11
41	12
42	16
43	17
44	21
45	22
46	26
47	27
48	6
49	7
50	11
51	12
52	16
53	17
54	21
55	22
56	16
57	17
58	21
59	22
60	26
61	27
62	31
63	32
64	1
65	2
66	7
67	8
68	16
69	17
70	22
71	23
72	21
73	22