a(n) = 2^n*C(n-1)-y(n), where y(n) = Sum_{i=1..n-1} (2^i*C(i-1)-y(i))*(2^(n-i)*C(n-i-1)-y(n-i)), y(0)=0, y(1)=1 and where C(i) is the i-th Catalan number.
A192482
a(n) = 2^n*C(n-1)-y(n), where y(n) = Sum_{i=1..n-1} (2^i*C(i-1)-y(i))*(2^(n-i)*C(n-i-1)-y(n-i)), y(0)=0, y(1)=1 and where C(i) is the i-th Catalan number.
Terms
- a(0) =1a(1) =3a(2) =10a(3) =51a(4) =286a(5) =1710a(6) =10740a(7) =69763a(8) =464822a(9) =3159450a(10) =21821516a(11) =152708078a(12) =1080452972a(13) =7716009724a(14) =55545950568a(15) =402649640163
External references
- oeis: A192482