Inverse Moebius transform of Pell numbers.

Terms

a(0) =1a(1) =3a(2) =6a(3) =15a(4) =30a(5) =78a(6) =170a(7) =423a(8) =991a(9) =2410a(10) =5742a(11) =13950a(12) =33462a(13) =80954a(14) =195060a(15) =471255a(16) =1136690a(17) =2745273a(18) =6625110a(19) =15996850a(20) =38614140a(21) =93228102a(22) =225058682a(23) =543354078a(24) =1311738151a(25) =3166849426a(26) =7645371036a(27) =18457637018a(28) =44560482150a(29) =107578717860