a(n) = 10*a(n-1) - 23*a(n-2) for n > 1; a(0) = 1, a(1) = 7.

A163346

a(n) = 10*a(n-1) - 23*a(n-2) for n > 1; a(0) = 1, a(1) = 7.

Terms

    a(0) =1a(1) =7a(2) =47a(3) =309a(4) =2009a(5) =12983a(6) =83623a(7) =537621a(8) =3452881a(9) =22163527a(10) =142219007a(11) =912428949a(12) =5853252329a(13) =37546657463a(14) =240841771063

External references