A163164 Positions n such that A163163(n) is not prime.

1, 4, 6, 10, 12, 14, 16, 18, 20, 21, 22, 24, 25, 26, 28, 30, 34, 36, 38, 39, 40, 42, 44, 45, 46, 48, 50, 51, 52, 54, 55, 56, 57, 58, 60, 62, 64, 66, 68, 70, 72, 74, 75, 76, 78, 80, 81, 82, 84, 85, 86, 88, 90, 91, 92, 93, 94, 96, 99, 100, 102, 104, 105, 106, 108, 110, 111, 112, 114, 115

Offset

1,2

Links

Table of n, a(n) for n=1..70.

Example

a(1)=1 because A163163(1)=1 is not prime. a(2)=4 because A163163(4)=6 is not prime.

Crossrefs

Cf. A000005, A000203, A007503, A163163.

Sequence in context: A328321 A287342 A309177 * A137230 A369896 A283564

Adjacent sequences: A163161 A163162 A163163 * A163165 A163166 A163167

Keyword

nonn,easy

Author

Juri-Stepan Gerasimov, Jul 22 2009

Extensions

33 removed by R. J. Mathar, Jul 25 2009

Status

approved