# A012713 (b-file synthesized from sequence entry) 0 0 1 1 2 2 3 3 4 -12 5 -147 6 -890 7 63 8 76776 9 1130489 10 6587338 11 -92728933 12 -3395342500 13 -47724446811 14 -11416580786 15 18058083754519 16 494993369091536 17 5229048665015409 18 -122759838344591214 19 -7368934381520578637