Number of nX6 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

A301821

Number of nX6 0..1 arrays with every element equal to 1 or 2 horizontally or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =50a(2) =278a(3) =1351a(4) =6501a(5) =31061a(6) =147954a(7) =705180a(8) =3364845a(9) =16066957a(10) =76746541a(11) =366661633a(12) =1751917453a(13) =8371075480a(14) =39999735173a(15) =191133225006a(16) =913306286525

External references