a(n) = T(2n,n), where T is the array defined in A025564.
A025570
a(n) = T(2n,n), where T is the array defined in A025564.
Terms
- a(0) =1a(1) =2a(2) =8a(3) =40a(4) =211a(5) =1148a(6) =6369a(7) =35816a(8) =203424a(9) =1164228a(10) =6703372a(11) =38785840a(12) =225325940a(13) =1313494396a(14) =7679038865a(15) =45006411960a(16) =264357297375
External references
- oeis: A025570