# A292617 (b-file synthesized from sequence entry) 0 1 1 2 2 4 3 10 4 25 5 70 6 209 7 656 8 2137 9 7155 10 24447 11 84864 12 298374 13 1060151 14 3800365 15 13727145 16 49910870 17 182522747 18 670896855 19 2477250003 20 9184502747 21 34177467134 22 127606759053 23 477890336663 24 1794697782990 25 6757164079051 26 25501212956975 27 96450275088260