A051615 - OEIS

A051615

Primes for which A051614 is 3.

5, 11, 17, 23, 29, 41, 47, 53, 71, 83, 89, 107, 113, 131, 137, 167, 173, 179, 191, 197, 227, 233, 239, 251, 257, 263, 281, 293, 317, 347, 359, 401, 419, 431, 443, 449, 467, 491, 509, 557, 569, 587, 593, 599, 617, 641, 647, 653, 659, 677, 683, 701, 719, 743

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OFFSET

1,1

LINKS

Table of n, a(n) for n=1..54.

FORMULA

Odd p values such that F(2*p*F(2*p+1)+1)=3, where F(x) is the least prime divisor of x.

CROSSREFS

Cf. A000945, A051309 - A051335, A005384.

Sequence in context: A007528 A144918 A144920 * A063909 A181575 A335070

Adjacent sequences: A051612 A051613 A051614 * A051616 A051617 A051618

KEYWORD

nonn

AUTHOR

Labos Elemer

STATUS

approved