# A157328 (b-file synthesized from sequence entry) 0 1 1 2 2 12 3 104 4 1072 5 12192 6 147648 7 1867392 8 24380160 9 326105600 10 4445965312 11 61555599360 12 863154221056 13 12233140576256 14 174954419109888 15 2521749245558784 16 36595543723671552 17 534249057803698176