# A148676 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 7 4 21 5 65 6 209 7 711 8 2479 9 8843 10 32395 11 120577 12 455385 13 1747389 14 6778983 15 26564107 16 105215535 17 420078017 18 1689539809 19 6848322853 20 27927549903 21 114530918967 22 472483367857 23 1958485189133 24 8154314127735 25 34110442991601 26 143238416823021 27 603675272939817 28 2553859981719389