A077845 Expansion of (1-x)^(-1)/(1-2*x-2*x^2-x^3).

1, 3, 9, 26, 74, 210, 595, 1685, 4771, 13508, 38244, 108276, 306549, 867895, 2457165, 6956670, 19695566, 55761638, 157871079, 446961001, 1265425799, 3582644680, 10143101960, 28716919080, 81302686761, 230182313643, 651686919889, 1845041153826, 5223638461074