a(0) = 1; a(n) = a(n-1) + Sum_{k=0..n-1} binomial(k+2,3) * a(k) * a(n-1-k).
A386453
a(0) = 1; a(n) = a(n-1) + Sum_{k=0..n-1} binomial(k+2,3) * a(k) * a(n-1-k).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =11a(4) =131a(5) =2888a(6) =107027a(7) =6212005a(8) =534389458a(9) =65203760863
External references
- oeis: A386453