T(n,k) = Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by k or less and triangles differing by a constant counted only once.
A195278
T(n,k) = Number of lower triangles of an n X n integer array with each element differing from all of its vertical and horizontal neighbors by k or less and triangles differing by a constant counted only once.
Terms
- a(0) =1a(1) =1a(2) =9a(3) =1a(4) =25a(5) =171a(6) =1a(7) =49a(8) =2125a(9) =6939a(10) =1a(11) =81a(12) =11319a(13) =626525a(14) =609309a(15) =1a(16) =121a(17) =39609a(18) =12608631a(19) =649112125a(20) =116330103a(21) =1a(22) =169a(23) =107811a(24) =119743353a(25) =68604760497a(27) =48439766655a(28) =1a(29) =225a(30) =248261
External references
- oeis: A195278