A278317 - cp's OEIS frontend

A278317 Number of neighbors of each new term in a right triangle read by rows.

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

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

cp's OEIS Frontend

A278317 Number of neighbors of each new term in a right triangle read by rows.

Table of values

List of values

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

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

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