# A097038 (b-file synthesized from sequence entry) 0 0 1 1 2 1 3 5 4 7 5 21 6 35 7 85 8 155 9 341 10 651 11 1365 12 2667 13 5461 14 10795 15 21845 16 43435 17 87381 18 174251 19 349525 20 698027 21 1398101 22 2794155 23 5592405 24 11180715 25 22369621 26 44731051 27 89478485 28 178940587 29 357913941 30 715795115 31 1431655765 32 2863245995