# A218619 (b-file synthesized from sequence entry) 0 1 1 1 2 11 3 72 4 734 5 6994 6 74641 7 803196 8 8989482 9 102192197 10 1184211027 11 13897707080 12 165052834584 13 1978844990494 14 23924151189858 15 291313067897212 16 3569576082827250 17 43981925261314302 18 544590342185545146 19 6772925262506494672 20 84567358373934285042