# A099265 (b-file synthesized from sequence entry) 1 1 2 3 3 8 4 23 5 75 6 277 7 1132 8 4977 9 22979 10 109451 11 531456 12 2610931 13 12917683 14 64181625 15 319695980 16 1594859885 17 7963472187 18 39784944799 19 198827606704 20 993846943839 21 4968361974491 22 24839192686973 23 124188113975628