72318976
domain: N
Appears in sequences
- a(n) = Sum_{r=0..2^(n-1)} (5^r/(2r)!)*Product_{k=0..2r-1} (2^n - k).at n=4A083696
- a(n) = 2*a(n-1) + 4*a(n-2), a(0)=1, a(1)=1.at n=16A084057
- a(n) = 4^n * T(n,3/2) where T is the Chebyshev polynomial of the first kind.at n=8A099140
- Hankel transform of A128057.at n=16A128056
- Duplicate of A084057.at n=15A163302