# A127847 (b-file synthesized from sequence entry) 0 0 1 1 2 20 3 1344 4 348160 5 357564416 6 1465657589760 7 24017731997138944 8 1574098141758535761920 9 412645105639632468417970176 10 432690992231222540584116394393600 11 1814838857553600260569028862094736359424 12 30447948962887853884238295543591323273401466880