# A001416 (b-file synthesized from sequence entry) 0 1 1 6 2 60 3 1368 4 15552 5 201240 6 2016432 7 21582624 8 201060768 9 1944012744 10 17257455960 11 156760071600 12 1346073913440 13 11734199738820 14 98420246759688