Numbers a(n) with property a(n) + a(n+5) = 2^(n+5) - 1 = A000225(n+5).

Terms

a(0) =0a(1) =1a(2) =3a(3) =7a(4) =15a(5) =31a(6) =62a(7) =124a(8) =248a(9) =496a(10) =992a(11) =1985a(12) =3971a(13) =7943a(14) =15887a(15) =31775a(16) =63550a(17) =127100a(18) =254200a(19) =508400a(20) =1016800a(21) =2033601a(22) =4067203a(23) =8134407a(24) =16268815a(25) =32537631a(26) =65075262a(27) =130150524a(28) =260301048a(29) =520602096