A280030 - cp's OEIS frontend

A280030 a(1)=5; thereafter, if n odd, a(n) = a(n-1)-st prime, and if n even, a(n) = a(n-1)-st nonprime.

n	a(n)
1	5
2	9
3	23
4	34
5	139
6	180
7	1069
8	1274
9	10399
10	11815
11	125933
12	138847
13	1854341
14	2003514
15	32513171
16	34639222
17	667169599
18	703599332
19	15783876803
20	16518738034
21	425079924023
22	442239042120
23	12891534052099
24	13348915604303
25	436194466471661

[5, 9, 23, 34, 139, 180, 1069, 1274, 10399, 11815, 125933, 138847, 1854341, 2003514, 32513171, 34639222, 667169599, 703599332, 15783876803, 16518738034, 425079924023, 442239042120, 12891534052099, 13348915604303, 436194466471661]

cp's OEIS Frontend

A280030 a(1)=5; thereafter, if n odd, a(n) = a(n-1)-st prime, and if n even, a(n) = a(n-1)-st nonprime.

Table of values

List of values