Numbers n such that s[n], p[n] and s[n]+p[n] are all prime numbers, where s[n] is the sum of digits of n and p[n] is the product of digits of n.
A065439
Numbers n such that s[n], p[n] and s[n]+p[n] are all prime numbers, where s[n] is the sum of digits of n and p[n] is the product of digits of n.
Terms
- a(0) =12a(1) =21a(2) =1112a(3) =1121a(4) =1211a(5) =2111a(6) =1111111112a(7) =1111111121a(8) =1111111211a(9) =1111112111a(10) =1111121111a(11) =1111211111a(12) =1112111111a(13) =1121111111a(14) =1211111111a(15) =2111111111
External references
- oeis: A065439