# A122835 (b-file synthesized from sequence entry) 0 1 1 1 2 4 3 19 4 112 5 811 6 7024 7 70939 8 818752 9 10630891 10 153371344 11 2433948859 12 42137351392 13 790287522571 14 15962014455664 15 345424786466779 16 7973482022972032 17 195556150543703851 18 5078301994885267984