Number of nX3 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
A301610
Number of nX3 0..1 arrays with every element equal to 1, 2 or 3 horizontally or vertically adjacent elements, with upper left element zero.
Terms
- a(0) =1a(1) =11a(2) =62a(3) =367a(4) =2131a(5) =12467a(6) =72758a(7) =425003a(8) =2481842a(9) =14494425a(10) =84647239a(11) =494344466a(12) =2886987133a(13) =16860117364a(14) =98463698698a(15) =575031667957
External references
- oeis: A301610