# A028187 (b-file synthesized from sequence entry) 0 1 1 33 2 692 3 11790 4 178311 5 2498643 6 33230002 7 425666400 8 5302894421 9 64673833653 10 775796369712 11 9184400635410 12 107582646828931 13 1249287573291063 14 14403306409895822 15 165064341717134820 16 1882103404758557841 17 21367906210495206873 18 241700345807807504332