# A016222 (b-file synthesized from sequence entry) 0 1 1 11 2 87 3 607 4 3983 5 25263 6 157039 7 964079 8 5871855 9 35580655 10 214882031 11 1294884591 12 7791677167 13 46839541487 14 281395162863 15 1689802632943 16 10144542420719 17 60890161016559 18 365432592068335