[1,0,4,4,12,20,44,84,172,340,684,1364,2732,5460,10924,21844,43692,87380,174764,349524,699052,1398100,2796204,5592404,11184812,22369620,44739244,89478484,178956972,357913940,715827884,1431655764,2863311532]