Numbers n such that ((1+I)^n+1)/(2+I) is a Gaussian prime.

Terms

a(0) =5a(1) =7a(2) =9a(3) =11a(4) =13a(5) =17a(6) =29a(7) =43a(8) =53a(9) =89a(10) =283a(11) =557a(12) =563a(13) =613a(14) =691a(15) =1223a(16) =2731a(17) =5147a(18) =5323a(19) =5479a(20) =9533a(21) =10771a(22) =11257a(23) =11519a(24) =12583a(25) =23081a(26) =36479a(27) =52567a(28) =52919a(29) =125929