Number of nX2 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value 2-x(i,j).
A229928
Number of nX2 0..2 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value 2-x(i,j).
Terms
- a(0) =3a(1) =19a(2) =115a(3) =739a(4) =4679a(5) =29569a(6) =187211a(7) =1185283a(8) =7502685a(9) =47491531a(10) =300627179a(11) =1902998895a(12) =12046125511a(13) =76252939087a(14) =482687382245
External references
- oeis: A229928