[1,3,7,20,64,232,908,3717,15716,67996,299396, 1337022,6040421,27556567,126762966,587324586, 2738338960,12837950292,60483207417,286206067039, 1359678614745,6482510515788,31006901328525, 148750651958227,715545729962692,3450638733403489]