67729

Appears in sequences

• Larger of Smith brothers.at n=32A050220
• The number of equal-sized equilateral triangles in the highest stack of triangles contained in successive Genealodrons formed from 2^n - 1 same size equilateral triangles.at n=22A179316
• Collatz trajectory starting at 3711.at n=32A179623
• Equals one maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 nX4 array.at n=4A220535
• T(n,k)=Equals one maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 nXk array.at n=32A220537
• Equals one maps: number of 5Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal, diagonal and antidiagonal neighbors in a random 0..1 5Xn array.at n=3A220541
• a(n) = Sum_{k=1..n} (n/gcd(k,n))^(gcd(k,n) - 1).at n=31A342421