a(n+1) is the smallest integer > a(n) such that the concatenation of [a(n+1)-a(n)] and a(n+1) is a prime number.
A173699
a(n+1) is the smallest integer > a(n) such that the concatenation of [a(n+1)-a(n)] and a(n+1) is a prime number.
Terms
- a(0) =1a(1) =3a(2) =7a(3) =9a(4) =11a(5) =17a(6) =21a(7) =23a(8) =33a(9) =47a(10) =53a(11) =57a(12) =61a(13) =63a(14) =67a(15) =69a(16) =71a(17) =77a(18) =83a(19) =87a(20) =91a(21) =93a(22) =101a(23) =111a(24) =113a(25) =131a(26) =141a(27) =143a(28) =1007a(29) =1011
External references
- oeis: A173699