# A009165 (b-file synthesized from sequence entry) 0 1 1 0 2 12 3 360 4 14672 5 947520 6 89973312 7 11518066560 8 1887213285632 9 383583690823680 10 94596308487109632 11 27811060234433710080 12 9605125245736932134912 13 3848453455438561596456960