a(n) is the smallest prime q such that q + prime(n) is of form 10^k or 2*10^k, or 0 if no such prime exists.
A382035
a(n) is the smallest prime q such that q + prime(n) is of form 10^k or 2*10^k, or 0 if no such prime exists.
Terms
- a(0) =0a(1) =7a(2) =5a(3) =3a(4) =89a(5) =7a(6) =3a(7) =181a(8) =977a(9) =71a(10) =1999969a(11) =163a(12) =59a(13) =157a(14) =53a(15) =47a(16) =41a(17) =139a(18) =1933a(19) =29a(20) =127a(21) =199921a(22) =17a(23) =11a(24) =3a(25) =999999999899a(26) =97a(27) =999999893a(28) =19891a(29) =887
External references
- oeis: A382035