Pell numbers A000129 without last digit.

Terms

a(0) =1a(1) =2a(2) =7a(3) =16a(4) =40a(5) =98a(6) =237a(7) =574a(8) =1386a(9) =3346a(10) =8078a(11) =19502a(12) =47083a(13) =113668a(14) =274421a(15) =662510a(16) =1599442a(17) =3861396a(18) =9322235a(19) =22505868a(20) =54333972a(21) =131173812a(22) =316681596a(23) =764537004a(24) =1845755605a(25) =4456048214a(26) =10757852035a(27) =25971752284a(28) =62701356604