# A152546 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 9 5 18 6 39 7 77 8 160 9 331 10 675 11 1394 12 2871 13 5899 14 12168 15 25047 16 51585 17 106316 18 219047 19 451361 20 930512 21 1917713 22 3953407 23 8150624 24 16804773 25 34649369 26 71453844 27 147346015 28 303878941 29 626728864 30 1292649339 31 2666247721