a(n) is the smallest odd prime that divides n + the sum of all smaller primes, or 0 if no such prime exists.
A274649
a(n) is the smallest odd prime that divides n + the sum of all smaller primes, or 0 if no such prime exists.
Terms
- a(0) =5a(1) =3a(2) =30915397a(3) =11339869a(4) =3a(5) =5a(6) =859a(7) =3a(8) =41a(9) =233a(10) =3a(11) =7a(12) =4175194313a(13) =3a(14) =307a(15) =5a(16) =3a(17) =1459a(18) =7a(19) =3a(20) =5a(21) =9907a(22) =3a(23) =647a(24) =13a(25) =3a(26) =31a(27) =11a(28) =3a(29) =193
External references
- oeis: A274649