A081717 Primes p[j] such that p[j]+j is composite.

5, 11, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 67, 71, 73, 83, 97, 103, 107, 109, 113, 127, 137, 149, 151, 157, 163, 167, 173, 179, 191, 193, 197, 199, 211, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283, 293, 307, 311, 313, 331, 337, 347

Offset

1,1

Links

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

Example

127 is the 31st prime and 127+31=158 is composite.

Mathematica

Do[s=Prime[n]+n;
If[ !PrimeQ[s], Print[Prime[n]]], {n, 1, 100}]

Crossrefs

Cf. A061067, A061068.

Sequence in context: A220432 A266420 A317048 * A096264 A239709 A175249

Adjacent sequences: A081714 A081715 A081716 * A081718 A081719 A081720

Keyword

nonn

Author

Labos Elemer, Apr 02 2003

Status

approved