A131102 Prime numbers arising from A131101.

2, 5, 7, 11, 23, 47, 37, 59, 41, 43, 47, 83, 107, 73, 83, 89, 97, 167, 179, 227, 139, 137, 151, 263, 151, 167, 157, 197, 347, 193, 359, 223, 383, 229, 241, 467, 479, 257, 293, 503, 281, 307, 283, 307, 317, 563, 313, 313, 587, 331, 349, 349, 367, 367, 419, 719

Offset: 1

Author

Tomas Xordan, Jun 14 2007

Keywords

• easy
• nonn

Comments

The Safe Primes (A005385) are part of this sequence because they are the result of adding A005384(n) (Sophie Germain primes) to its only prime factor (itself) + 1 = 2*A005384 + 1 .

Examples

			a(8)=59 because 59 = A131101(8)+ prime factors of A131101(8) +1 = 29+ (29) +1.
a(9)=41 because A131101(9)+ prime factors of A131101(8) + 1 = 30 +(2+3+5)+1.
		

Crossrefs

Cf. A131101, A005384, A005385.

Formula

A131101(n) + prime factors of A131101(n) + 1 = a(n) ; a(n) is a prime number.