[0,0,2,4,10,20,44,88,186,372,772,1544,3172,6344,12952,25904,52666,105332,213524,427048,863820,1727640,3488872,6977744,14073060,28146120,56708264,113416528,228318856,456637712,918624304,1837248608,3693886906,7387773812,14846262964,29692525928]