Find the first (maximal) string of consecutive primes of length exactly n which alternate between 4*k+1 and 4*k+3 or 4*k+3 and 4*k+1 as in A002144(4*n+1) and A002145(4*n+3). The first element is a(n).
A247384
Find the first (maximal) string of consecutive primes of length exactly n which alternate between 4*k+1 and 4*k+3 or 4*k+3 and 4*k+1 as in A002144(4*n+1) and A002145(4*n+3). The first element is a(n).
Terms
- a(0) =97a(1) =11a(2) =3a(3) =23a(4) =47a(5) =167a(6) =131a(7) =2011a(8) =233a(9) =23633a(10) =34499a(11) =1013a(12) =9341a(13) =90659a(14) =521a(15) =51749a(16) =505049a(17) =1391087a(18) =2264839a(19) =2556713a(20) =17123893a(21) =2569529a(22) =15090641a(23) =18246451a(24) =6160043a(25) =1557431471a(26) =43679609a(27) =198572029a(28) =701575297a(29) =5552898499
External references
- oeis: A247384