Number of nX4 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
A302666
Number of nX4 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
Terms
- a(0) =2a(1) =45a(2) =164a(3) =934a(4) =4267a(5) =21949a(6) =106793a(7) =529984a(8) =2617548a(9) =12938179a(10) =63986777a(11) =316244862a(12) =1563877465a(13) =7731246308a(14) =38227036552a(15) =188999363652a(16) =934471931880
External references
- oeis: A302666