# A171188 (b-file synthesized from sequence entry) 0 1 1 8 2 8 3 -16 4 48 5 -160 6 528 7 -1600 8 3952 9 -4512 10 -31040 11 322496 12 -2021584 13 10452384 14 -47768512 15 196396032 16 -719709808 17 2244001312 18 -5014625888 19 -511332480 20 96425281504 21 -773680460288 22 4504107424128 23 -22283547559808 24 97629901795824