# A255276 (b-file synthesized from sequence entry) 0 1 1 8 2 28 3 128 4 480 5 2008 6 7776 7 31672 8 124528 9 500792 10 1982144 11 7926808 12 31474832 13 125567832 14 499339552 15 1989964024 16 7918843056 17 31542845816 18 125560568192 19 500031498968 20 1990726198480 21 7927069429912 22 31561303322592 23 125671455827384