489847

Properties

Appears in sequences

• Triangle read by rows: T(n,k) is the number of deco polyominoes of height n and having k columns ending at an even level (1<=k<=n). A deco polyomino is a directed column-convex polyomino in which the height, measured along the diagonal, is attained only in the last column.at n=47A121698
• Lesser of Gridgeman pairs in base 16 in increasing order: pairs of primes palindromic in base 16 which differ only in their middle digits by a difference of 1.at n=22A246872
• Prime numbersat n=40753