A337334 - cp's OEIS frontend

A337334 a(n) = pi(b(n)), where pi is the prime counting function (A000720) and b(n) = a(n-1) + b(n-1) with a(0) = b(0) = 1.

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	5
6	7
7	9
8	11
9	14
10	16
11	21
12	24
13	30
14	35
15	42
16	48
17	58
18	67
19	78
20	91
21	103
22	121
23	138
24	158
25	181
26	205
27	233
28	266
29	298
30	337
31	378
32	429
33	480
34	539
35	602
36	674
37	751
38	838
39	930
40	1031
41	1147
42	1274
43	1402
44	1556
45	1715
46	1896
47	2090
48	2296
49	2527
50	2777
51	3047
52	3340
53	3669
54	4016

[1, 1, 2, 3, 4, 5, 7, 9, 11, 14, 16, 21, 24, 30, 35, 42, 48, 58, 67, 78, 91, 103, 121, 138, 158, 181, 205, 233, 266, 298, 337, 378, 429, 480, 539, 602, 674, 751, 838, 930, 1031, 1147, 1274, 1402, 1556, 1715, 1896, 2090, 2296, 2527, 2777, 3047, 3340, 3669, 4016]

cp's OEIS Frontend

A337334 a(n) = pi(b(n)), where pi is the prime counting function (A000720) and b(n) = a(n-1) + b(n-1) with a(0) = b(0) = 1.

Table of values

List of values