A049181 Revert transform of 2*(1 + x + x^2 + x^3 + x^4 + x^5 + x^6)-1/(1-x).

1, 1, 1, 1, 1, 1, 3, 17, 73, 241, 661, 1585, 3461, 7285, 16231, 41921, 124577, 389233, 1186617, 3423201, 9327801, 24355849, 62489483, 162336209, 437155705, 1226390417, 3534342301, 10244919841, 29383388701, 82792942045