Number of nX6 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A317861

Number of nX6 0..1 arrays with every element unequal to 1, 2 or 4 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =5a(1) =46a(2) =72a(3) =313a(4) =1001a(5) =3315a(6) =9045a(7) =28091a(8) =87900a(9) =278545a(10) =886735a(11) =2839893a(12) =9137066a(13) =29485535a(14) =95531190a(15) =309974578a(16) =1006908674a(17) =3276702465a(18) =10670545757a(19) =34779631546a(20) =113424839856a(21) =370091478755

External references