a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n+k,k) * binomial(n+2*k,k) * 2^(n-k).
A382934
a(n) = Sum_{k=0..n} binomial(n,k) * binomial(n+k,k) * binomial(n+2*k,k) * 2^(n-k).
Terms
- a(0) =1a(1) =8a(2) =142a(3) =3188a(4) =79306a(5) =2091128a(6) =57251944a(7) =1609275536a(8) =46123258714
External references
- oeis: A382934