Number of nX4 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.
A268794
Number of nX4 0..2 arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.
Terms
- a(0) =36a(1) =234a(2) =950a(3) =4800a(4) =23994a(5) =117062a(6) =561116a(7) =2652936a(8) =12405748a(9) =57490444a(10) =264428454a(11) =1208522850a(12) =5493284922a(13) =24851601802a(14) =111963916212a(15) =502590509990
External references
- oeis: A268794