a(n) = largest prime using least number of possible digits with a digit sum n, or 0 if no such number exists. E.g., if n > 9 and there are no two-digit primes with a given digit sum n then three-digit numbers are explored and so on.

A088115

a(n) = largest prime using least number of possible digits with a digit sum n, or 0 if no such number exists. E.g., if n > 9 and there are no two-digit primes with a given digit sum n then three-digit numbers are explored and so on.

Terms

    a(0) =0a(1) =2a(2) =3a(3) =31a(4) =5a(5) =0a(6) =7a(7) =71a(8) =0a(9) =73a(10) =83a(11) =0a(12) =67a(13) =59a(14) =0a(15) =97a(16) =89a(17) =0a(18) =991a(19) =983a(20) =0a(21) =967a(22) =977a(23) =0a(24) =997a(25) =9791a(26) =0a(27) =9973a(28) =9929a(29) =0

External references