# A084014 (b-file synthesized from sequence entry) 1 1 2 11 3 37 4 528 5 10001 6 33517 7 143143 8 2637514 9 11118889 10 100000001 11 909109091 12 33333516667 13 76925323077 14 1428575357143 15 33333334666667 16 131875000000007 17 588235305882353 18 11111111538888889 19 52631579052631579