# A219974 (b-file synthesized from sequence entry) 0 1 1 0 2 7 3 58 4 286 5 3068 6 29876 7 214485 8 1910822 9 17671945 10 141365332 11 1225043571 12 10871708273 13 90688536786 14 781019641877 15 6800784990468 16 57716277595775 17 496096480109463 18 4284929501626939 19 36621478929328140 20 314572431365390797 21 2707867101849205129