# A206293 (b-file synthesized from sequence entry) 0 1 1 1 2 2 3 5 4 18 5 78 6 415 7 2467 8 16212 9 114623 10 863229 11 6858780 12 57156213 13 497147291 14 4497291265 15 42189445764 16 409478828567 17 4103901097024 18 42403116824997 19 451059832858894 20 4933844398096693 21 55436157047213427 22 639215949145395559 23 7557505365363885063