OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
15 is a term because it is not prime and A337183(15) = 29 is prime.
MAPLE
f:= proc(n) local F, b, i;
F:= sort(map(t -> t[1]$t[2], ifactors(n)[2]), `>`);
b:= convert(F, `+`);
(add(F[i]*b^(i-1), i=1..nops(F)));
end proc:
select(t -> not isprime(t) and isprime(f(t)), [$2..300]);
CROSSREFS
KEYWORD
nonn,base
AUTHOR
J. M. Bergot and Robert Israel, Jan 29 2021
STATUS
approved