a(n) is the least prime of the form (3^r*5^s*7^t + 1)/2, r, s, t > 0, r + s + t = n.
A337428
a(n) is the least prime of the form (3^r*5^s*7^t + 1)/2, r, s, t > 0, r + s + t = n.
Terms
- a(0) =53a(1) =263a(2) =1103a(3) =6563a(4) =4253a(5) =49613a(6) =38273a(7) =1041863a(8) =344453a(9) =60775313a(10) =109395563a(11) =119601563a(12) =151903553a(13) =325507613a(14) =3797588813a(15) =202622460863a(16) =17437907813a(17) =11299764263a(18) =20339575673a(19) =282494106563
External references
- oeis: A337428