T(n,k)=Number of nXk 0..7 arrays with some element plus some horizontally or vertically adjacent neighbor totalling seven exactly once.
A270118
T(n,k)=Number of nXk 0..7 arrays with some element plus some horizontally or vertically adjacent neighbor totalling seven exactly once.
Terms
- a(0) =0a(1) =8a(2) =8a(3) =112a(4) =1344a(5) =112a(6) =1176a(7) =100800a(8) =100800a(9) =1176a(10) =10976a(11) =6183744a(12) =45440640a(13) =6183744a(14) =10976a(15) =96040a(16) =345422784a(17) =16972694928a(18) =16972694928a(19) =345422784a(20) =96040a(21) =806736a(22) =18272616768
External references
- oeis: A270118