Number of nX7 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A318544
Number of nX7 0..1 arrays with every element unequal to 0, 1, 4 or 6 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =21a(1) =26a(2) =107a(3) =516a(4) =2349a(5) =10496a(6) =46165a(7) =208159a(8) =942764a(9) =4213744a(10) =18870716a(11) =84794983a(12) =380556843a(13) =1707239770a(14) =7660779072a(15) =34376713801a(16) =154258564357a(17) =692193258418
External references
- oeis: A318544