72387

Appears in sequences

• Number of nX1 0..4 arrays with every element value z a city block distance of exactly z from another element value z.at n=12A209717
• Number of -2..2 arrays x(i) of n+1 elements i=1..n+1 with x(i)+x(j), x(i+1)+x(j+1), -(x(i)+x(j+1)), and -(x(i+1)+x(j)) having one or three distinct values for every i<=n and j<=n.at n=11A211460
• Index of first occurrence of n appearing twice in succession in van Eck's sequence (A181391), or 0 if it never occurs.at n=15A308782