# A133552 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 8 4 16 5 31 6 57 7 109 8 209 9 401 10 769 11 1473 12 2817 13 5391 14 10321 15 19761 16 37834 17 72432 18 138663 19 265455 20 508195 21 972909 22 1862575 23 3565778 24 6826437 25 13068741 26 25019217 27 47897608 28 91696751 29 175547250 30 336073354 31 643389727 32 1231726180