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(1-6*floor[floor[n/2]-n/2])*((7/4)*16^floor[n/2]+7*2^floor[n/2]-(2/9)*9^floor[n/2]+(1/19)*19^floor[n/2]+14)+((1/3)*6^floor[n/2]-1)*floor[floor[n/2]-n/2]
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