# A377186 (b-file synthesized from sequence entry) 0 1 1 0 2 6 3 6 4 30 5 60 6 170 7 420 8 1050 9 2660 10 6552 11 16380 12 40362 13 99792 14 245520 15 603372 16 1480050 17 3624192 18 8863712 19 21647340 20 52811616 21 128700000 22 313341756 23 762206016 24 1852565650 25 4499346072 26 10919990460 27 26485897932 28 64201490352 29 155536089240 30 376606931436