# A213236 (b-file synthesized from sequence entry) 1 1 2 -2 3 9 4 -64 5 625 6 -7776 7 117649 8 -2097152 9 43046721 10 -1000000000 11 25937424601 12 -743008370688 13 23298085122481 14 -793714773254144 15 29192926025390625 16 -1152921504606846976 17 48661191875666868481 18 -2185911559738696531968 19 104127350297911241532841