# A037661 (b-file synthesized from sequence entry) 1 3 2 16 3 80 4 403 5 2016 6 10080 7 50403 8 252016 9 1260080 10 6300403 11 31502016 12 157510080 13 787550403 14 3937752016 15 19688760080 16 98443800403 17 492219002016 18 2461095010080 19 12305475050403 20 61527375252016 21 307636876260080