[0,0,1,1,2,4,7,13,24,44,99,185,328,612,1521,2956, 4693,8900,20185,33049,53332,144483,291848,459666, 1135955,2443813,4246722,12285846,19716010, 34278280,118852511,154192582,281332336,550783729, 1117407516,2301424427]