a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n,4*k+1) * a(n-4*k-1).
A352429
a(0) = 1; a(n) = Sum_{k=0..floor((n-1)/4)} binomial(n,4*k+1) * a(n-4*k-1).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =121a(6) =732a(7) =5166a(8) =41664a(9) =378001a(10) =3810512a(11) =42253926a(12) =511139904a(13) =6698457481a(14) =94535404992
External references
- oeis: A352429