[1,3,6,8,16,18,36,38,76,78,156,158,316,318,636,638,1276,1278,2556,2558,5116,5118,10236,10238,20476,20478,40956,40958,81916,81918,163836,163838,327676,327678,655356,655358,1310716,1310718,2621436,2621438]