Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318349
Number of nX7 0..1 arrays with every element unequal to 0, 1, 3 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =21a(1) =30a(2) =71a(3) =106a(4) =279a(5) =842a(6) =2429a(7) =7451a(8) =22996a(9) =70762a(10) =218768a(11) =677035a(12) =2090867a(13) =6478680a(14) =20058184a(15) =62168555a(16) =192733963a(17) =597744210a(18) =1854283003a(19) =5753186642a(20) =17852343400a(21) =55399248790a(22) =171922042756a(23) =533541165687
External references
- oeis: A318349