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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; text; internal format)
OFFSET
1,1
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 .
LINKS
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 because A131101(9)+ prime factors of A131101(8) + 1 = 30 +(2+3+5)+1.
CROSSREFS
Sequence in context: A172981 A141064 A344990 * A235468 A229209 A227613
KEYWORD
easy,nonn
AUTHOR
Tomas Xordan, Jun 14 2007
STATUS
approved

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Last modified March 28 22:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)