# A007021 (b-file synthesized from sequence entry) 3 1 4 1 5 1 6 1 7 1 8 2 9 4 10 10 11 25 12 87 13 313 14 1357 15 6244 16 30926 17 158428 18 836749 19 4504607 20 24649284 21 136610879 22 765598927 23 4332047595 24 24724362117 25 142205424580 26 823687567019 27 4801749063379