# A370889 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 9 4 72 5 735 6 9000 7 133035 8 2325120 9 46631025 10 1053108000 11 26484495345 12 734652737280 13 22280390827695 14 733335188826240 15 26035824337798275 16 991872319953715200 17 40360728513989909025 18 1747119524427614937600 19 80166580022376802179225