# A099790 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 6 4 105 5 284 6 747 7 984 8 2230 9 5377 10 11513 11 15453 12 56611 13 140810 14 1282328 15 2175211 16 3328834 17 96073801 18 285626436 19 801855023 20 927833490