a(n) = Sum_{k=0..n} (n - k)! * k! / floor(k / 2)!^2, row sums of A349269.
A349270
a(n) = Sum_{k=0..n} (n - k)! * k! / floor(k / 2)!^2, row sums of A349269.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =16a(4) =46a(5) =204a(6) =986a(7) =6400a(8) =48094a(9) =420140a(10) =4112822a(11) =44575584a(12) =528787260a(13) =6811260792a(14) =94637153172
External references
- oeis: A349270