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

Terms

a(0) =3a(1) =10a(2) =29a(3) =83a(4) =232a(5) =643a(6) =1771a(7) =4862a(8) =13321a(9) =36455a(10) =99696a(11) =272535a(12) =744839a(13) =2035358a(14) =5561381a(15) =15195075a(16) =41515496a(17) =113425323a(18) =309888403a(19) =846638398a(20) =2313071313a(21) =6319448079a(22) =17265085152a(23) =47169141487a(24) =128868574671a(25) =352075628734a(26) =961888724621