# A126408 (b-file synthesized from sequence entry) 0 1 1 21 2 99 3 475 4 2293 5 11111 6 53973 7 262649 8 1279855 9 6243155 10 30479985 11 148910385 12 727918557 13 3559976043 14 17417455619 15 85244931269 16 417326666085 17 2043565752795 18 10008988327829 19 49030629716903 20 240219997723397