61693

Appears in sequences

• Numbers k such that 5*10^k + R_k + 2 is a prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=14A103005
• Number of n X 2 0..3 arrays with no element equal to zero plus the sum of elements to its left or one plus the sum of elements above it or one plus the sum of the elements diagonally to its northwest or one plus the sum of the elements antidiagonally to its northeast, modulo 4.at n=48A239594
• a(n) = prime(n)^3 mod (n^2 + prime(n)^2).at n=59A243769
• Least k such that sigma(k*n)/tau(k*n) = sigma(k*n+1)/tau(k*n+1), or 0 if no such k exists.at n=40A274774
• Maximum starting value of X such that repeated replacement of X with X-ceiling(X/5) requires n steps to reach 0.at n=45A279075