a(n) = Sum_{k=0..n} binomial(8*n,8*k).A070832a(n) = Sum_{k=0..n} binomial(8*n,8*k).Terms a(0) =1a(1) =2a(2) =12872a(3) =1470944a(4) =622116992a(5) =125858012672External referencesoeis: A070832