# A138443 (b-file synthesized from sequence entry) 1 15 2 180 3 3900 4 29400 5 442860 6 1206660 7 6034320 8 11761380 9 37008840 10 148705620 11 221875680 12 641431260 13 1187525640 14 1580340300 15 2694803280 16 5541089580 17 10545132540 18 12880092660 19 22614594420 20 32025069720 21 37833555240