Number of sequences of n 2's and 3's with curling number 2 and which have the form XY^2 with Y = 2.

Terms

a(0) =0a(1) =1a(2) =1a(3) =2a(4) =4a(5) =8a(6) =16a(7) =32a(8) =63a(9) =126a(10) =252a(11) =502a(12) =1004a(13) =2008a(14) =4012a(15) =8024a(16) =16048a(17) =32089a(18) =64178a(19) =128356a(20) =256696a(21) =513392a(22) =1026784a(23) =2053538a(24) =4107076a(25) =8214152a(26) =16428241a(27) =32856482a(28) =65712964a(29) =131425806