# A227053 (b-file synthesized from sequence entry) 0 1 1 1 2 56 3 17550 4 15249024 5 28143753000 6 94689953674560 7 525169893772283760 8 4469844204191484518400 9 55337211594165488805417600 10 955860613004397508326213120000 11 22282564877342299983672172489536000 12 682182070950002359574696677978908672000 13 26812831292465310201469047550286967518976000