# A049391 (b-file synthesized from sequence entry) 0 1 1 -15 2 -75 3 -875 4 -13125 5 -223125 6 -4090625 7 -78890625 8 -1577812500 9 -32432812500 10 -681089062500 11 -14550539062500 12 -315261679687500 13 -6911506054687500 14 -153040491210937500 15 -3417904303710937500