# A129416 (b-file synthesized from sequence entry) 1 1 2 3 3 9 4 32 5 135 6 709 7 4637 8 38374 9 391473 10 4764778 11 66913591 12 1056886475 13 18446472265 14 351482430368 15 7247888726269 16 160671989129665 17 3808499268504548 18 96094161981827499 19 2570930535917564366 20 72688753062897675445