# A125809 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 18 5 44 6 120 7 348 8 1064 9 3368 10 10952 11 36336 12 122570 13 419104 14 1449672 15 5064240 16 17844558 17 63356072 18 226459120 19 814323856 20 2944055592 21 10695723368 22 39029679176 23 142998497292 24 525862368660 25 1940381764088 26 7182278240848