a(n) = 16^n * Sum_{k=0..n} binomial(1/2, k)^2.
A358364
a(n) = 16^n * Sum_{k=0..n} binomial(1/2, k)^2.
Terms
- a(0) =1a(1) =20a(2) =324a(3) =5200a(4) =83300a(5) =1333584a(6) =21344400a(7) =341580096a(8) =5466017700a(9) =87464462800
External references
- oeis: A358364