# A127389 (b-file synthesized from sequence entry) 0 1 1 1 2 0 3 1 4 2 5 4 6 10 7 23 8 56 9 138 10 344 11 870 12 2220 13 5716 14 14828 15 38717 16 101682 17 268416 18 711810 19 1895432 20 5066030 21 13586082 22 36547534 23 98593064 24 266661162 25 722953814 26 1964358938 27 5348367006 28 14589803090 29 39870312218 30 109136843138