Least positive integer k such that prime(prime(k)), prime(prime(k*n)), prime(p) and prime(q) form a 4-term arithmetic progression for some pair of primes p and q.
A261462
Least positive integer k such that prime(prime(k)), prime(prime(k*n)), prime(p) and prime(q) form a 4-term arithmetic progression for some pair of primes p and q.
Terms
- a(0) =1a(1) =5109a(2) =879a(3) =27956a(4) =103840a(5) =32205a(6) =21404a(7) =1800a(8) =4241a(9) =81794a(10) =2355a(11) =4352a(12) =14974a(13) =8552a(14) =26159a(15) =17621a(16) =91986a(17) =52574a(18) =73764a(19) =4699a(20) =12546a(21) =27347a(22) =71148a(23) =6819a(24) =333a(25) =38830a(26) =28809a(27) =2058a(28) =24609a(29) =84
External references
- oeis: A261462