# A181685 (b-file synthesized from sequence entry) 1 0 2 36 3 432 4 1296 5 15552 6 139968 7 559872 8 5038848 9 40310784 10 181398528 11 1451188224 12 10883911680 13 52242776064 14 391820820480 15 2821109907456 16 14105549537280 17 101559956668416 18 710919696678912 19 3656158440062976 20 25593109080440832 21 175495605123022848 22 921351926895869952