Number of nX5 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero.
A230828
Number of nX5 0..3 arrays x(i,j) with each element horizontally, vertically or antidiagonally next to at least one element with value (x(i,j)+1) mod 4 and at least one element with value (x(i,j)-1) mod 4, no adjacent elements equal, and upper left element zero.
Terms
- a(0) =0a(1) =16a(2) =38a(3) =176a(4) =898a(5) =4350a(6) =22852a(7) =122740a(8) =661598a(9) =3593650a(10) =19572998a(11) =106801924a(12) =583264796a(13) =3186690816a(14) =17414382012a(15) =95176462582a(16) =520213927428
External references
- oeis: A230828