67108916domain: NAppears in sequencesSum_{d|n, d odd} d*2^(n/d).at n=26A054600A067076 + A000079/2.at n=27A092176Number of 2 X n 0-1 matrices avoiding simultaneously the right angled numbered polyomino patterns (ranpp) (00;1), (01;0), (10;0) and (01;1).at n=26A100314Duplicate of A100314.at n=26A131831a(n) = 4^n + 4*n.at n=13A221906