67517

Appears in sequences

• a(n) = 62*n^2 - 1.at n=32A158680
• Numbers k such that 7*R_(k+2) + 10^k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=20A257033
• a(n) = Sum_{k=0..(n-1)/2} (n+2-k)*binomial(n-1-k,k).at n=19A271785
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 918", based on the 5-celled von Neumann neighborhood.at n=33A290673