2118969471

Appears in sequences

• Number of n-bit strings that contain no more than 4 zeros and no more than 2 leading and 2 trailing zeros.at n=31A102026
• Hilltop maps: number of n X 1 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal or vertical neighbor in a random 0..2 n X 1 array.at n=31A218199
• Hilltop maps: number of n X 2 binary arrays indicating the locations of corresponding elements not exceeded by any horizontal, vertical or antidiagonal neighbor in a random 0..1 n X 2 array.at n=15A218420