# A012030 (b-file synthesized from sequence entry) 0 1 1 -2 2 16 3 -440 4 20224 5 -1582976 6 178612864 7 -27969867008 8 5765737517056 9 -1516228355846144 10 495092243779256320 11 -196552136456231321600 12 93232152295610535018496 13 -52074797114273752377786368