a(n) = n! * Sum_{k=0..floor(n/4)} (-n/4)^k /(k! * (n-4*k)!).
A362315
a(n) = n! * Sum_{k=0..floor(n/4)} (-n/4)^k /(k! * (n-4*k)!).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =-23a(5) =-149a(6) =-539a(7) =-1469a(8) =77281a(9) =911737a(10) =5657401a(11) =25134121a(12) =-2065730039a(13) =-35352993389a(14) =-310739232803
External references
- oeis: A362315