Sequence of sums of alternating increasing powers of 2.

Terms

a(0) =1a(1) =5a(2) =7a(3) =15a(4) =19a(5) =35a(6) =43a(7) =75a(8) =91a(9) =155a(10) =187a(11) =315a(12) =379a(13) =635a(14) =763a(15) =1275a(16) =1531a(17) =2555a(18) =3067a(19) =5115a(20) =6139a(21) =10235a(22) =12283a(23) =20475a(24) =24571a(25) =40955a(26) =49147a(27) =81915a(28) =98299a(29) =163835