A049182 Revert transform of 2*(1 + x + x^2 + x^7)-1/(1-x).

1, 1, 3, 9, 33, 125, 501, 2063, 8719, 37531, 164093, 726491, 3250743, 14676923, 66780835, 305908709, 1409609741, 6529455069, 30386379215, 142002499261, 666116180157, 3135363209281, 14803932109737, 70097438174979