# A012640 (b-file synthesized from sequence entry) 0 1 1 -5 2 73 3 -3565 4 337873 5 -53181845 6 12563583641 7 -4158179320061 8 1836546568939681 9 -1043609929405146661 10 741652625178569817577 11 -644417189348695489885965 12 672084091294680203529876081