# A340894 (b-file synthesized from sequence entry) 0 1 1 1 2 3 3 18 4 126 5 958 6 7707 7 64564 8 557519 9 4928784 10 44398592 11 406119900 12 3762522607 13 35236156779 14 333052648607 15 3173351871750 16 30448930792460 17 293980976342244 18 2854070686906317 19 27845872331417000 20 272896298225616888 21 2685318944226499424 22 26521692874280137381