Number of nX7 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A303313
Number of nX7 0..1 arrays with every element equal to 0, 1, 4, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =21a(1) =23a(2) =158a(3) =439a(4) =1799a(5) =7096a(6) =26184a(7) =100128a(8) =387892a(9) =1473950a(10) =5617780a(11) =21537368a(12) =82283698a(13) =314136752a(14) =1201134460a(15) =4591062616a(16) =17541004106a(17) =67038118694a(18) =256214474112a(19) =979116873266
External references
- oeis: A303313