a(n+1) = 4*a(n)*(a(n)+1) for a(0) = 1.A190840a(n+1) = 4*a(n)*(a(n)+1) for a(0) = 1.Terms a(0) =1a(1) =8a(2) =288a(3) =332928a(4) =443365544448External referencesoeis: A190840