[0,2,2,4,10,24,56,142,346,874,2210,5640,14440, 37224,96128,249108,646710,1681772,4378614, 11411374,29760404,77658384,202729956,529406180, 1382821596,3612643922,9439431124,24666860228, 64464076954,168480273482]