93135

Appears in sequences

• Matrix product of unsigned Lah-triangle |A008297(n,k)| and Stirling2-triangle A008277(n,k).at n=22A088814
• Least number k such that n*k^n +/- 1 are twin primes, or a(n) = 0 if no such number exists.at n=25A239735
• Triangular array read by rows, the matrix product of the unsigned Lah numbers and the Stirling set numbers, T(n,k) for n>=0 and 0<=k<=n.at n=30A256892
• a(n) = Sum_{k=1..n} sigma(k)*sigma(2*k), where sigma(n) = A000203(n) is the sum of the divisors of n.at n=33A347108