Real part of (2 + i)^n, where i = sqrt(-1).

Terms

a(0) =1a(1) =2a(2) =3a(3) =2a(4) =-7a(5) =-38a(6) =-117a(7) =-278a(8) =-527a(9) =-718a(10) =-237a(11) =2642a(12) =11753a(13) =33802a(14) =76443a(15) =136762a(16) =164833a(17) =-24478a(18) =-922077a(19) =-3565918a(20) =-9653287a(21) =-20783558a(22) =-34867797a(23) =-35553398a(24) =32125393a(25) =306268562a(26) =1064447283a(27) =2726446322a(28) =5583548873a(29) =8701963882