# A027779 (b-file synthesized from sequence entry) 4 15 5 126 6 588 7 2016 8 5670 9 13860 10 30492 11 61776 12 117117 13 210210 14 360360 15 594048 16 946764 17 1465128 18 2209320 19 3255840 20 4700619 21 6662502 22 9287124 23 12751200 24 17267250 25 23088780 26 30515940 27 39901680 28 51658425 29 66265290 30 84275856 31 106326528 32 133145496 33 165562320 34 204518160