a(n) is the rational part of A(n) = (6-sqrt(7))*A(n-1) - (12-4*sqrt(7))*A(n-2) + (8-3*sqrt(7))*A(n-3) with A(0)=3, A(1)=6-sqrt(7), A(2)=19-4*sqrt(7).
A215817
a(n) is the rational part of A(n) = (6-sqrt(7))*A(n-1) - (12-4*sqrt(7))*A(n-2) + (8-3*sqrt(7))*A(n-3) with A(0)=3, A(1)=6-sqrt(7), A(2)=19-4*sqrt(7).
Terms
- a(0) =3a(1) =6a(2) =19a(3) =66a(4) =237a(5) =866a(6) =3202a(7) =11948a(8) =44917a(9) =169914a(10) =646134a(11) =2467988a(12) =9462498a(13) =36398004a(14) =140399901a(15) =542894726a(16) =2103745125a(17) =8167514346a(18) =31762430143a(19) =123704647562a(20) =482435457922
External references
- oeis: A215817