
COMMENTS

Were only the first few terms of the sequence taken into account, it would appear that the sequence consists only of 0 and powers of 2. Upon dividing out the powers of 2 from each term of the sequence, one sees that, actually, a(n) = c(n)*d(n) with c = (1, 1, 1, 1, 0, 1, 0, 0, 1, 1, 1, 1, 3, 1, 3, 3, 13, 19, 7, 41, 15, 11, 129, 189,) and d = (2^0, 2^0, 2, 2^2, 0, 2^4, 0, 0, 2^7, 2^8, 2^9, 2^(11), 2^(11), 2^(14), 2^(14), 2^(14), 2^(15), 2^(16), 2^(19), 2^(18), 2^(21), 2^(23), 2^(21), 2^(22),).
