# A220411 (b-file synthesized from sequence entry) 0 1 1 -6 2 60 3 -504 4 2160 5 -3168 6 786240 7 -51840 8 1762560 9 -82736640 10 1437004800 11 -858470400 12 101896704000 13 -1881169920 14 8659353600 15 -855305256960 16 14071151001600 17 -150493593600 18 8252165711462400 19 -70431001804800 20 24434139856896000 21 -1076294062964736000