OFFSET
1
LINKS
PROG
(PARI) A354344(n) = { if(!(n%15), n/=15, if(!(n%9), n/=9, if(!(n%8), n/=8, if(!(n%3), n/=3, if(!(n%2), n/=2, return(0)))))); ((n>5) && isprime(n) && isprime((1+n)/2)); };
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, May 25 2022
STATUS
approved