a(n) = ( (7 + 2*sqrt(2))^n - (7 - 2*sqrt(2))^n )/(4*sqrt(2)).

A154347

a(n) = ( (7 + 2*sqrt(2))^n - (7 - 2*sqrt(2))^n )/(4*sqrt(2)).

Terms

    a(0) =1a(1) =14a(2) =155a(3) =1596a(4) =15989a(5) =158410a(6) =1562191a(7) =15375864a(8) =151212265a(9) =1486561286a(10) =14612155139a(11) =143621159220

External references