A084354 - OEIS

A084354

Primes whose product of nonzero digits + 1 is prime.

2, 11, 23, 29, 41, 43, 47, 61, 67, 89, 101, 149, 163, 167, 211, 223, 227, 229, 233, 251, 257, 263, 269, 281, 349, 367, 383, 401, 409, 419, 431, 433, 439, 463, 491, 521, 523, 569, 587, 601, 607, 613, 617, 631, 643, 659, 661, 673, 761, 769, 809, 821, 827, 857

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

Robert Israel, Table of n, a(n) for n = 1..10000

MAPLE

filter:= proc(n) local p;

if not isprime(n) then return false fi;

p:= 1+ convert(subs(0=NULL, convert(n, base, 10)), `*`);

isprime(p)

end proc:

select(filter, [2, seq(i, i=3..1000, 2)]); # Robert Israel, Mar 06 2018