# A228702 (b-file synthesized from sequence entry) 0 0 1 1 2 8 3 36 4 164 5 694 6 2792 7 11008 8 42484 9 161395 10 606000 11 2252856 12 8307224 13 30424076 14 110774704 15 401307232 16 1447463192 17 5200692085 18 18622103160 19 66476800796 20 236657676956 21 840418968098 22 2977799304536 23 10529449821312 24 37162248493740 25 130933420076839