STATUS
editing
approved
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Revision History for A034782
(Bold, blue-underlined text is an addition; faded, red-underlined text is aShowing entries 1-10 | older changes
Numbers n such that A034693(n) = 3: 3n + 1 is prime, but neither n + 1 nor 2n + 1.
(history; published version)
(history; published version)
NAME
Numbers n such that A034693(n) = 3: 3n + 1 is prime, but not neither n + 1 nor 2n + 1.
STATUS
proposed
editing
STATUS
editing
proposed
NAME
Numbers n such that A034693(n) = 3 i.e., : 3n + 1 is prime, but not n + 1 and nor 2n + 1 are composite.
STATUS
proposed
editing
STATUS
editing
proposed
NAME
Numbers k n such that A034693(kn) = 3 i.e., 3n + 1 is prime, n + 1 and 2n + 1 are composite.
PROG
(PARI) is(n)=!isprime(n+1)&&!isprime(2*n+1)&&isprime(3*n+1) \\ M. F. Hasler, May 13 2018
EXTENSIONS
Name edited by M. F. Hasler, May 13 2018
STATUS
approved
editing
STATUS
reviewed
approved
STATUS
proposed
reviewed
STATUS
editing
proposed