# A019147 (b-file synthesized from sequence entry) 3 1 4 0 5 4 6 6 7 21 8 32 9 46 10 88 11 190 12 468 13 1046 14 2370 15 6015 16 12766 17 33972 18 81676 19 202255 20 504674 21 1275789 22 3206424 23 8249961 24 21031764 25 54337702 26 140377742 27 364430952 28 948642166 29 2473160606 30 6456496008 31 16874434634