33137

Appears in sequences

• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 28.at n=12A031706
• Concatenate n with n-th prime.at n=32A045532
• First differences of Stern's sequence A005230.at n=17A066777
• a(n) = sigma[k](n) - phi(n)^k - d(n)^k for k=3.at n=31A079539
• a(n) = 169*n^2 + 13.at n=14A158548
• Number of zero-sum -1..1 arrays of n elements with first through third differences also in -1..1.at n=31A202504
• a(n) = Sum_{k=1..n} binomial(n,k) * tau(k) * tau(n - k + 1), where tau = A000005.at n=11A328681
• Numbers k such that the concatenation in increasing order of their prime factors, with multiplicity, is congruent to 1 (mod k).at n=9A349705