[0,2,2,6,10,22,38,82,154,318,614,1250,2462,4962, 9842,19766,39378,78910,157502,315322,630030, 1260674,2520098,5041446,10080430,20163322, 40321682,80648326,161286810,322583462,645147158, 1290314082,2580588786,5161216950]