A138143 - cp's OEIS frontend

A138143 Triangle read by rows in which row n lists p(1), p(2), ..., p(n), p(n-1), ..., p(1), where p(i) = i-th prime.

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

[2, 2, 3, 2, 2, 3, 5, 3, 2, 2, 3, 5, 7, 5, 3, 2, 2, 3, 5, 7, 11, 7, 5, 3, 2, 2, 3, 5, 7, 11, 13, 11, 7, 5, 3, 2, 2, 3, 5, 7, 11, 13, 17, 13, 11, 7, 5, 3, 2, 2, 3, 5, 7, 11, 13, 17, 19, 17, 13, 11, 7, 5, 3, 2, 2, 3, 5, 7, 11, 13, 17, 19, 23, 19, 17, 13, 11, 7, 5, 3, 2, 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 23, 19, 17, 13, 11, 7, 5, 3, 2]

cp's OEIS Frontend

A138143 Triangle read by rows in which row n lists p(1), p(2), ..., p(n), p(n-1), ..., p(1), where p(i) = i-th prime.

Table of values

List of values

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

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

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