T(n,k)=Number of nXk 0..7 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling seven exactly once.
A270150
T(n,k)=Number of nXk 0..7 arrays with some element plus some horizontally, diagonally, antidiagonally or vertically adjacent neighbor totalling seven exactly once.
Terms
- a(0) =0a(1) =8a(2) =8a(3) =112a(4) =1440a(5) =112a(6) =1176a(7) =85056a(8) =85056a(9) =1176a(10) =10976a(11) =4126368a(12) =24250368a(13) =4126368a(14) =10976a(15) =96040a(16) =182257536a(17) =5750902944a(18) =5750902944a(19) =182257536a(20) =96040a(21) =806736a(22) =7623445344a(26) =7623445344a(27) =806736
External references
- oeis: A270150