# A130040 (b-file synthesized from sequence entry) 0 1 1 20 2 1600 3 6400 4 409600 5 204800000 6 16384000000 7 327680000000 8 83886080000000 9 67108864000000 10 671088640000000000 11 13421772800000000000 12 4294967296000000000000 13 17179869184000000000000