# A129937 (b-file synthesized from sequence entry) 1 1 2 1 3 0 4 0 5 0 6 5 7 14 8 42 9 90 10 207 11 407 12 858 13 1638 14 3341 15 6330 16 12750 17 24174 18 48467 19 92207 20 184566 21 352506 22 705201 23 1351825 24 2703880 25 5200000 26 10400275 27 20057949 28 40116222 29 77558354 30 155117085 31 300539730 32 601079894 33 1166802582 34 2333605659 35 4537567055 36 9075134670 37 17672631234 38 35345263097 39 68923263669 40 137846528040 41 269128936400 42 538257873579