

A339945


Numbers y such that sqrt(6*y^2+10)3 is prime.


2




OFFSET

1,1


COMMENTS

sqrt(p + (p^21)/6) for p in A339935.
Primes in this sequence include 3, 13, 31. Are there any others?


LINKS



EXAMPLE

a(3) = 31 is a term because sqrt(6*31^2+10)3 = 73 is prime.


MAPLE

g:= gfun:rectoproc({a(i+4)10*a(i+2)+a(i)=0, a(0)=1, a(1)=3, a(2)=13, a(3)= 31}, a(i), remember):
select(y > isprime(sqrt(6*y^2+10)3), map(g, [$1..100]));


CROSSREFS



KEYWORD

nonn


AUTHOR



STATUS

approved



