A105047 - cp's OEIS frontend

A105047 Form an addition table of the primes; a(n) is the number of even numbers that appear for the first time in column n.

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

[1, 1, 2, 2, 3, 3, 3, 3, 3, 3, 5, 4, 5, 3, 4, 3, 3, 7, 4, 5, 4, 3, 5, 5, 6, 5, 5, 4, 4, 3, 7, 5, 5, 7, 5, 5, 6, 4, 6, 5, 5, 7, 4, 6, 5, 4, 6, 5, 8, 5, 7, 4, 5, 6, 5, 3, 3, 8, 8, 5, 4, 5, 8, 8, 5, 5, 9, 4, 8, 7, 7, 6, 6, 5, 5, 7, 5, 7, 7, 6, 6, 6, 6, 5, 7, 7, 6, 6, 5, 6, 5, 5, 7, 4, 8, 4, 8, 5, 8, 7, 8, 9, 7, 5, 9]

cp's OEIS Frontend

A105047 Form an addition table of the primes; a(n) is the number of even numbers that appear for the first time in column n.

Table of values

List of values

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

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

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