Semiprimes where the sum of the digits equals the difference between the prime factors.
A308821
Semiprimes where the sum of the digits equals the difference between the prime factors.
Terms
- a(0) =14a(1) =95a(2) =527a(3) =851a(4) =1247a(5) =3551a(6) =4307a(7) =8051a(8) =14351a(9) =26969a(10) =30227a(11) =37769a(12) =64769a(13) =87953a(14) =152051a(15) =163769a(16) =199553a(17) =202451a(18) =256793a(19) =275369a(20) =341969a(21) =455369a(22) =1070969a(23) =1095953a(24) =1159673a(25) =1232051a(26) =1625369a(27) =1702769a(28) =2005007a(29) =2081993
External references
- oeis: A308821