a(n) = (n+1)*4^(2n+1).A267796a(n) = (n+1)*4^(2n+1).Terms a(0) =4a(1) =128a(2) =3072a(3) =65536a(4) =1310720a(5) =25165824a(6) =469762048a(7) =8589934592a(8) =154618822656External referencesoeis: A267796