Euler transform of Pell numbers.

Terms

a(0) =1a(1) =1a(2) =3a(3) =8a(4) =23a(5) =62a(6) =175a(7) =477a(8) =1319a(9) =3602a(10) =9851a(11) =26779a(12) =72726a(13) =196724a(14) =531157a(15) =1430144a(16) =3842911a(17) =10303055a(18) =27570786a(19) =73637306a(20) =196333303a(21) =522584286a(22) =1388786089a(23) =3685169795a(24) =9764703347a(25) =25838430572a(26) =68282175170a(27) =180221449469a(28) =475102410065