a(n) is the numerator of tan(n * arctan(1/n)).

A348140

a(n) is the numerator of tan(n * arctan(1/n)).

Terms

    a(0) =1a(1) =4a(2) =13a(3) =240a(4) =719a(5) =42372a(6) =92567a(7) =14970816a(8) =21475201a(9) =8825080100a(10) =7836127861

External references