a(0) = 1 and a(n) = (1/n) * Sum_{k=1..n} (-n)^(n-k) * binomial(n,k) * binomial(n,k-1) for n > 0.
A336728
a(0) = 1 and a(n) = (1/n) * Sum_{k=1..n} (-n)^(n-k) * binomial(n,k) * binomial(n,k-1) for n > 0.
Terms
- a(0) =1a(1) =1a(2) =-1a(3) =1a(4) =9a(5) =-174a(6) =2575a(7) =-38219a(8) =588833a(9) =-9274418a(10) =141253551a(11) =-1739881142a(12) =-753419447
External references
- oeis: A336728