Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
A301402
Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 3, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =4a(1) =32a(2) =252a(3) =1988a(4) =15680a(5) =123676a(6) =975492a(7) =7694176a(8) =60687676a(9) =478672964a(10) =3775524480a(11) =29779382108a(12) =234884346116
External references
- oeis: A301402