A227030 Numbers that are neither the difference nor the product of two primes.

7, 13, 19, 23, 31, 37, 43, 47, 53, 61, 63, 67, 73, 75, 79, 83, 89, 97, 103, 109, 113, 117, 127, 131, 139, 151, 153, 157, 163, 167, 173, 175, 181, 193, 199, 207, 211, 223, 229, 233, 241, 243, 245, 251, 257, 263, 271, 273, 277, 283, 285, 293, 297, 307, 313, 317

Offset

1,1

Links

Table of n, a(n) for n=1..56.

Formula

A007921 \ A001358.

Crossrefs

Cf. A007921, A157931.

Sequence in context: A354460 A176406 A033561 * A049591 A176180 A209623

Adjacent sequences: A227027 A227028 A227029 * A227031 A227032 A227033

Keyword

nonn

Author

Gerasimov Sergey, Jun 28 2013

Status

approved