p-INVERT of (1,0,0,1,0,0,1,0,0,...), where p(S) = (1 - 2 S)^2.

Terms

a(0) =4a(1) =12a(2) =32a(3) =84a(4) =216a(5) =544a(6) =1348a(7) =3300a(8) =8000a(9) =19236a(10) =45936a(11) =109056a(12) =257604a(13) =605820a(14) =1419232a(15) =3313396a(16) =7711944a(17) =17900320a(18) =41445764a(19) =95746260a(20) =220735616a(21) =507934276a(22) =1166792160a(23) =2676017408a(24) =6128381316a(25) =14015556588a(26) =32012831648a(27) =73033858964a(28) =166434905016