Number of nX3 0..4 arrays with rows and columns lexicographically nondecreasing and no element equal to the number of horizontal and vertical neighbors equal to itself.
A201724
Number of nX3 0..4 arrays with rows and columns lexicographically nondecreasing and no element equal to the number of horizontal and vertical neighbors equal to itself.
Terms
- a(0) =20a(1) =631a(2) =19827a(3) =499474a(4) =9603489a(5) =144262866a(6) =1757594146a(7) =17915547783a(8) =156619023957
External references
- oeis: A201724