Number of nX6 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

A317813

Number of nX6 0..1 arrays with every element unequal to 0, 2 or 3 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.

Terms

    a(0) =1a(1) =10a(2) =8a(3) =56a(4) =94a(5) =142a(6) =434a(7) =1071a(8) =2279a(9) =6087a(10) =15953a(11) =40210a(12) =104488a(13) =270430a(14) =701710a(15) =1825318a(16) =4749330a(17) =12368352a(18) =32279336a(19) =84388645a(20) =220794188a(21) =577879166a(22) =1513375097a(23) =3965597997a(24) =10397097617a(25) =27277536409a(26) =71596450975a(27) =187986384248

External references