A192560 Primes of the form n + sum of proper non-divisors of n.

2, 5, 7, 29, 41, 47, 239, 617, 719, 1217, 1523, 2017, 2411, 2801, 3359, 4933, 6959, 7369, 10079, 10271, 10181, 11801, 12479, 20399, 25247, 34319, 37853, 38639, 38923, 40823, 41887, 45599, 47939, 51749, 52289, 52127, 56207, 61031, 63113, 65519, 72959, 79559

Offset

1,1

Comments

Generated by n = 2, 3, 4, 8, 9, 10, 22, 35, 38, 49, 55, 64,...

Links

Charles R Greathouse IV, Table of n, a(n) for n = 1..10000

Formula

p: A000027(n)+A024816(n).

Prog

(PARI) for(n=2, 1e3, if(isprime(t=n*(n+3)/2-sigma(n)), print1(t", "))) \\ Charles R Greathouse IV, Jul 10 2011

Crossrefs

Cf. A024816 (antisigma).

Sequence in context: A137098 A082013 A171831 * A174288 A293062 A293063

Adjacent sequences: A192557 A192558 A192559 * A192561 A192562 A192563

Keyword

nonn

Author

Juri-Stepan Gerasimov, Jul 10 2011

Extensions

a(13)-a(50) from Charles R Greathouse IV, Jul 10 2011

Status

approved