A212211 - cp's OEIS frontend

A212211 Triangle read by rows: T(n,k) = pi(n) + pi(k) - pi(n+k), n >= 2, 2 <= k <= n, where pi() = A000720().

n	a(n)
2	0
3	0
4	1
5	0
6	0
7	0
8	0
9	1
10	1
11	2
12	0
13	1
14	1
15	1
16	1
17	1
18	2
19	1
20	2
21	1
22	2
23	1
24	1
25	1
26	1
27	1
28	2
29	2
30	0
31	1
32	0
33	1
34	1
35	2
36	1
37	1
38	0
39	0
40	0
41	1
42	1
43	1
44	1
45	0
46	0
47	0
48	1
49	1
50	2
51	1
52	2
53	1
54	1
55	1
56	2
57	0
58	1
59	1
60	1
61	1
62	1
63	1
64	1
65	1
66	1
67	1
68	1
69	2
70	1
71	2
72	1
73	2
74	2
75	2
76	1
77	2
78	2
79	3

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

cp's OEIS Frontend

A212211 Triangle read by rows: T(n,k) = pi(n) + pi(k) - pi(n+k), n >= 2, 2 <= k <= n, where pi() = A000720().

Table of values

List of values

n	a(n)
2	0
3	0
4	1
5	0
6	0
7	0
8	0
9	1
10	1
11	2
12	0
13	1
14	1
15	1
16	1
17	1
18	2
19	1
20	2
21	1
22	2
23	1
24	1
25	1
26	1
27	1
28	2
29	2
30	0
31	1
32	0
33	1
34	1
35	2
36	1
37	1
38	0
39	0
40	0
41	1
42	1
43	1
44	1
45	0
46	0
47	0
48	1
49	1
50	2
51	1
52	2
53	1
54	1
55	1
56	2
57	0
58	1
59	1
60	1
61	1
62	1
63	1
64	1
65	1
66	1
67	1
68	1
69	2
70	1
71	2
72	1
73	2
74	2
75	2
76	1
77	2
78	2
79	3

n	a(n)
2	0
3	0
4	1
5	0
6	0
7	0
8	0
9	1
10	1
11	2
12	0
13	1
14	1
15	1
16	1
17	1
18	2
19	1
20	2
21	1
22	2
23	1
24	1
25	1
26	1
27	1
28	2
29	2
30	0
31	1
32	0
33	1
34	1
35	2
36	1
37	1
38	0
39	0
40	0
41	1
42	1
43	1
44	1
45	0
46	0
47	0
48	1
49	1
50	2
51	1
52	2
53	1
54	1
55	1
56	2
57	0
58	1
59	1
60	1
61	1
62	1
63	1
64	1
65	1
66	1
67	1
68	1
69	2
70	1
71	2
72	1
73	2
74	2
75	2
76	1
77	2
78	2
79	3

n	a(n)
2	0
3	0
4	1
5	0
6	0
7	0
8	0
9	1
10	1
11	2
12	0
13	1
14	1
15	1
16	1
17	1
18	2
19	1
20	2
21	1
22	2
23	1
24	1
25	1
26	1
27	1
28	2
29	2
30	0
31	1
32	0
33	1
34	1
35	2
36	1
37	1
38	0
39	0
40	0
41	1
42	1
43	1
44	1
45	0
46	0
47	0
48	1
49	1
50	2
51	1
52	2
53	1
54	1
55	1
56	2
57	0
58	1
59	1
60	1
61	1
62	1
63	1
64	1
65	1
66	1
67	1
68	1
69	2
70	1
71	2
72	1
73	2
74	2
75	2
76	1
77	2
78	2
79	3