# A045695 (b-file synthesized from sequence entry) 1 0 2 1 3 2 4 8 5 22 6 70 7 202 8 622 9 1844 10 5576 11 16658 12 50114 13 150140 14 450824 15 1351850 16 4056794 17 12168538 18 36509302 19 109522330 20 328578142 21 985717768 22 2957186620 23 8871509746 24 26614629466 25 79843738258 26 239531515054 27 718594094338