# A012093 (b-file synthesized from sequence entry) 0 1 1 -2 2 32 3 -1224 4 89984 5 -10705408 6 1889967232 7 -464238999808 8 151661217091584 9 -63641246944645120 10 33381024310383640576 11 -21408234533329528127488 12 16485197581627921671815168