# A327764 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 10 5 21 6 47 7 99 8 211 9 455 10 973 11 2081 12 4464 13 9558 14 20466 15 43848 16 93914 17 201140 18 430844 19 922818 20 1976553 21 4233613 22 9067960 23 19422576 24 41601229 25 89105550 26 190854784 27 408791400 28 875589076 29 1875421302 30 4016959325 31 8603912899 32 18428694036 33 39472363286