n-th 4k+1 prime times (n+1)st 4k+3 prime.

Terms

a(0) =35a(1) =143a(2) =323a(3) =667a(4) =1147a(5) =1763a(6) =2491a(7) =3599a(8) =4891a(9) =6319a(10) =7663a(11) =8383a(12) =11227a(13) =12091a(14) =17399a(15) =19519a(16) =21823a(17) =26123a(18) =29503a(19) =32231a(20) =35263a(21) =43739a(22) =46367a(23) =50851a(24) =57311a(25) =61063a(26) =66203a(27) =70531a(28) =77059a(29) =84823