230784

Appears in sequences

• Number of nX4 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique.at n=4A265969
• Number of nX5 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique.at n=3A265970
• T(n,k) = Number of n X k 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique.at n=31A265973
• T(n,k) = Number of n X k 0..4 arrays with the absolute differences of each element with its with horizontal and vertical neighbors unique.at n=32A265973
• Triangle T(m,k) read by rows, where T(m,k) is the number of ways in which 1<=k<=m positions can be picked in an m X m square grid such that the picked positions have a point symmetry or a line symmetry.at n=33A292153
• Irregular triangle read by rows: T(n,k) is the number of chordless cycles of length k in the n-diagonal intersection graph, 4 <= k <= kmax.at n=61A371340