# A215506 (b-file synthesized from sequence entry) 0 1 1 1 2 5 3 39 4 387 5 4516 6 59522 7 864981 8 13641761 9 230931591 10 4162594198 11 79412758356 12 1595971048438 13 33662065586127 14 742852904575909 15 17107642358401929 16 410242691108675077 17 10223836926997402818 18 264339609703677876178 19 7079673476173815446742