# A102620 (b-file synthesized from sequence entry) 1 1 2 5 3 15 4 41 5 113 6 313 7 867 8 2401 9 6649 10 18413 11 50991 12 141209 13 391049 14 1082929 15 2998947 16 8304961 17 22998865 18 63690581 19 176377839 20 488441801 21 1352638145 22 3745850473 23 10373355075 24 28726852897 25 79553054089 26 220305664445 27 610090792143 28 1689519766073 29 4678774170521 30 12956893537633 31 35881426208451 32 99366159258241 33 275173945103905 34 762037102261925 35 2110303520940111