A064960 - cp's OEIS frontend

A064960 The prime then composite recurrence; a(2n) = a(2n-1)-th prime and a(2n+1) = a(2n)-th composite and a(1) = 1.

n	a(n)
1	1
2	2
3	6
4	13
5	22
6	79
7	108
8	593
9	722
10	5471
11	6290
12	62653
13	69558
14	876329
15	951338
16	14679751
17	15692307
18	289078661
19	305618710
20	6588286337
21	6908033000
22	171482959009
23	178668550322
24	5040266614919
25	5225256019175
26	165678678591359
27	171068472492228
28	6039923990345039

[1, 2, 6, 13, 22, 79, 108, 593, 722, 5471, 6290, 62653, 69558, 876329, 951338, 14679751, 15692307, 289078661, 305618710, 6588286337, 6908033000, 171482959009, 178668550322, 5040266614919, 5225256019175, 165678678591359, 171068472492228, 6039923990345039]

cp's OEIS Frontend

A064960 The prime then composite recurrence; a(2n) = a(2n-1)-th prime and a(2n+1) = a(2n)-th composite and a(1) = 1.

Table of values

List of values