# A351733 (b-file synthesized from sequence entry) 0 1 1 0 2 4 3 6 4 56 5 250 6 1812 7 12614 8 101040 9 864882 10 7988780 11 78726142 12 823897032 13 9111774698 14 106068603396 15 1295153135670 16 16538681229152 17 220281968528098 18 3053087839536732 19 43941561067048430 20 655501502129291640 21 10118103843683127642