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A131102 Prime numbers arising from A131101. 1
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 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

COMMENTS

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

FORMULA

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

EXAMPLE

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

CROSSREFS

Cf. A131101; A005384; A005385.

Sequence in context: A038955 A172981 A141064 * A168031 A039679 A088823

Adjacent sequences:  A131099 A131100 A131101 * A131103 A131104 A131105

KEYWORD

easy,nonn

AUTHOR

Tomas Xordan (xordan.tom(AT)gmail.com), Jun 14 2007

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Last modified February 16 16:25 EST 2012. Contains 205938 sequences.