The natural numbers sequence where every composite is replaced by a prime, according to the rule explained in the Comments section (a(n) = -1 if no such prime is reached).
A316941
The natural numbers sequence where every composite is replaced by a prime, according to the rule explained in the Comments section (a(n) = -1 if no such prime is reached).
Terms
- a(0) =1a(1) =2a(2) =3a(3) =211a(4) =5a(5) =23a(6) =7a(7) =2692213a(8) =311a(9) =773a(10) =11a(11) =3251a(12) =13a(13) =313a(14) =1129a(15) =3313788967a(16) =17a(17) =29a(18) =19a(19) =724553a(20) =37a(21) =211a(22) =23a(23) =2692213a(24) =773a(25) =3251a(26) =313a(27) =3313788967a(28) =29a(29) =3181
External references
- oeis: A316941