20283

Appears in sequences

• Diagonal sums of number triangle A107030.at n=12A107031
• Sums of the diagonals of the matrix formed by listing the h-Stohr sequences in increasing order.at n=21A193911
• Number of 0..n arrays of length 5 with each element differing from at least one neighbor by 1 or less.at n=19A221597
• Number of n X 3 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value within 2 of its king move distance from the upper left and every value increasing by 0 or 1 with every step right, diagonally se or down.at n=25A253218