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

Terms

a(0) =3a(1) =7a(2) =18a(3) =45a(4) =108a(5) =258a(6) =615a(7) =1459a(8) =3453a(9) =8164a(10) =19287a(11) =45540a(12) =107496a(13) =253695a(14) =598659a(15) =1412587a(16) =3332970a(17) =7863853a(18) =18553752a(19) =43774722a(20) =103279023a(21) =243668295a(22) =574890057a(23) =1356344056a(24) =3200033343a(25) =7549859464a(26) =17812425600a(27) =42024945087a(28) =99149648967a(29) =233924207559