# A009819 (b-file synthesized from sequence entry) 0 0 1 2 2 16 3 32 4 -18944 5 -2146048 6 -147605504 7 12359002112 8 9374161371136 9 2762835317030912 10 343159496128331776 11 -231213975915368808448 12 -236417180330506147856384 13 -118337919812286157284179968