Number of length-n 0..2 arrays with no following elements greater than or equal to the first repeated value.

A267226

Number of length-n 0..2 arrays with no following elements greater than or equal to the first repeated value.

Terms

    a(0) =3a(1) =9a(2) =21a(3) =47a(4) =103a(5) =223a(6) =479a(7) =1023a(8) =2175a(9) =4607a(10) =9727a(11) =20479a(12) =43007a(13) =90111a(14) =188415a(15) =393215a(16) =819199a(17) =1703935a(18) =3538943a(19) =7340031a(20) =15204351a(21) =31457279a(22) =65011711a(23) =134217727a(24) =276824063a(25) =570425343a(26) =1174405119a(27) =2415919103a(28) =4966055935

External references