Largest prime factor of 2^(2*n+1)-2^(n+1)+1.

Terms

a(0) =5a(1) =5a(2) =113a(3) =37a(4) =397a(5) =1613a(6) =61a(7) =953a(8) =457a(9) =14449a(10) =30269a(11) =8101a(12) =246241a(13) =107367629a(14) =384773a(15) =312709a(16) =47392381a(17) =184481113a(18) =1249a(19) =12112549a(21) =54001a(24) =26317a(26) =415878438361a(27) =525313a(28) =174877a(29) =368140581013