# A142703 (b-file synthesized from sequence entry) 1 1 2 1 3 8 4 54 5 496 6 5500 7 71952 8 1084328 9 18500480 10 352526544 11 7420540480 12 171007474528 13 4282272360192 14 115785275702720 15 3361891345761536 16 104330298643927680 17 3446150079670054912 18 120716332862675408128