A356918 - cp's OEIS frontend

A356918 Triangle read by rows where T(n,k) is Colijn and Plazzotta's distance metric d_1(n,k) between rooted binary tree numbers n and k, for 1 <= k <= n.

n	a(n)
1	0
2	2
3	0
4	4
5	2
6	0
7	6
8	4
9	4
10	0
11	6
12	4
13	2
14	4
15	0
16	8
17	6
18	4
19	4
20	4
21	0
22	10
23	8
24	6
25	6
26	6
27	4
28	0
29	8
30	6
31	6
32	2
33	6
34	4
35	6
36	0
37	10
38	8
39	8
40	4
41	8
42	6
43	6
44	4
45	0
46	12
47	10
48	8
49	6
50	8
51	6
52	6
53	6
54	4
55	0
56	14
57	12
58	12
59	8
60	12
61	10
62	10
63	8
64	6
65	6
66	0
67	8
68	6
69	4
70	6
71	2
72	4
73	6
74	6
75	8
76	8
77	12
78	0

[0, 2, 0, 4, 2, 0, 6, 4, 4, 0, 6, 4, 2, 4, 0, 8, 6, 4, 4, 4, 0, 10, 8, 6, 6, 6, 4, 0, 8, 6, 6, 2, 6, 4, 6, 0, 10, 8, 8, 4, 8, 6, 6, 4, 0, 12, 10, 8, 6, 8, 6, 6, 6, 4, 0, 14, 12, 12, 8, 12, 10, 10, 8, 6, 6, 0, 8, 6, 4, 6, 2, 4, 6, 6, 8, 8, 12, 0]

cp's OEIS Frontend

A356918 Triangle read by rows where T(n,k) is Colijn and Plazzotta's distance metric d_1(n,k) between rooted binary tree numbers n and k, for 1 <= k <= n.

Table of values

List of values

n	a(n)
1	0
2	2
3	0
4	4
5	2
6	0
7	6
8	4
9	4
10	0
11	6
12	4
13	2
14	4
15	0
16	8
17	6
18	4
19	4
20	4
21	0
22	10
23	8
24	6
25	6
26	6
27	4
28	0
29	8
30	6
31	6
32	2
33	6
34	4
35	6
36	0
37	10
38	8
39	8
40	4
41	8
42	6
43	6
44	4
45	0
46	12
47	10
48	8
49	6
50	8
51	6
52	6
53	6
54	4
55	0
56	14
57	12
58	12
59	8
60	12
61	10
62	10
63	8
64	6
65	6
66	0
67	8
68	6
69	4
70	6
71	2
72	4
73	6
74	6
75	8
76	8
77	12
78	0

n	a(n)
1	0
2	2
3	0
4	4
5	2
6	0
7	6
8	4
9	4
10	0
11	6
12	4
13	2
14	4
15	0
16	8
17	6
18	4
19	4
20	4
21	0
22	10
23	8
24	6
25	6
26	6
27	4
28	0
29	8
30	6
31	6
32	2
33	6
34	4
35	6
36	0
37	10
38	8
39	8
40	4
41	8
42	6
43	6
44	4
45	0
46	12
47	10
48	8
49	6
50	8
51	6
52	6
53	6
54	4
55	0
56	14
57	12
58	12
59	8
60	12
61	10
62	10
63	8
64	6
65	6
66	0
67	8
68	6
69	4
70	6
71	2
72	4
73	6
74	6
75	8
76	8
77	12
78	0

n	a(n)
1	0
2	2
3	0
4	4
5	2
6	0
7	6
8	4
9	4
10	0
11	6
12	4
13	2
14	4
15	0
16	8
17	6
18	4
19	4
20	4
21	0
22	10
23	8
24	6
25	6
26	6
27	4
28	0
29	8
30	6
31	6
32	2
33	6
34	4
35	6
36	0
37	10
38	8
39	8
40	4
41	8
42	6
43	6
44	4
45	0
46	12
47	10
48	8
49	6
50	8
51	6
52	6
53	6
54	4
55	0
56	14
57	12
58	12
59	8
60	12
61	10
62	10
63	8
64	6
65	6
66	0
67	8
68	6
69	4
70	6
71	2
72	4
73	6
74	6
75	8
76	8
77	12
78	0