T(n,k)=Number of nXk 0..4 arrays with rows and columns lexicographically nondecreasing and no element equal to the number of horizontal and vertical neighbors equal to itself.
A201729
T(n,k)=Number of nXk 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) =4a(1) =10a(2) =10a(3) =20a(4) =90a(5) =20a(6) =35a(7) =631a(8) =631a(9) =35a(10) =56a(11) =3567a(12) =19827a(13) =3567a(14) =56a(15) =83a(16) =16493a(17) =499474a(18) =499474a(19) =16493a(20) =83a(21) =116a(22) =64018a(23) =9603489a(24) =56836178a(25) =9603489a(26) =64018a(27) =116a(28) =155a(29) =213013
External references
- oeis: A201729