A168279 (n+1)-th prime nonprime minus (n+1)-th prime.

1, 3, 3, 5, 7, 8, 8, 10, 11, 13, 14, 15, 15, 17, 19, 21, 21, 23, 23, 23, 26, 28, 29, 29, 31, 31, 33, 33, 33, 37, 38, 39, 39, 41, 43, 45, 45, 46, 46, 47, 49, 52, 52, 52, 53, 55, 59, 60, 60, 61, 61, 61, 64, 65, 65, 66, 67, 67, 69, 69, 71, 74, 75, 75, 76, 79, 79, 81, 81, 83, 85, 86

Offset

1,2

Links

Table of n, a(n) for n=1..72.

Formula

a(n)=A141468(A000040(n+1))-A000040(n+1)=A144570(n+1)-A000040(n+1).

Crossrefs

Cf. A000040(the primes), A141468(the positive nonprimes), A144570(the prime nonprimes).

Sequence in context: A101300 A172290 A076524 * A171957 A278166 A293990

Adjacent sequences: A168276 A168277 A168278 * A168280 A168281 A168282

Keyword

nonn

Author

Juri-Stepan Gerasimov, Nov 22 2009

Status

approved