a(n) = n! * Sum_{k=0..floor(n/4)} (-n)^k / (k! * (n-4*k)!).
A362322
a(n) = n! * Sum_{k=0..floor(n/4)} (-n)^k / (k! * (n-4*k)!).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-95a(5) =-599a(6) =-2159a(7) =-5879a(8) =1276801a(9) =14669425a(10) =90669601a(11) =402407281a(12) =-136515598559
External references
- oeis: A362322