Real part of Q^n, where Q is the quaternion 2 + j + k.

Terms

a(0) =1a(1) =2a(2) =2a(3) =-4a(4) =-28a(5) =-88a(6) =-184a(7) =-208a(8) =272a(9) =2336a(10) =7712a(11) =16832a(12) =21056a(13) =-16768a(14) =-193408a(15) =-673024a(16) =-1531648a(17) =-2088448a(18) =836096a(19) =15875072a(20) =58483712a(21) =138684416a(22) =203835392a(23) =-16764928a(24) =-1290072064a(25) =-5059698688a(26) =-12498362368a(27) =-19635257344a(28) =-3550855168a(29) =103608123392