# A104723 (b-file synthesized from sequence entry) 0 0 1 1 2 0 3 2 4 4 5 10 6 18 7 42 8 80 9 168 10 330 11 682 12 1340 13 2730 14 5418 15 10910 16 21760 17 43690 18 87192 19 174762 20 349180 21 699006 22 1397418 23 2796202 24 5590960 25 11184800 26 22366890 27 44739072 28 89473020 29 178956970 30 357902670 31 715827882 32 1431633920 33 2863310846