377753

Appears in sequences

• a(n) = least semiprime with factors not previously used containing integers 2n and 2n+1 as substrings.at n=25A086887
• Poincaré series [or Poincare series] P(T_{4,2}; x).at n=16A124616
• Number of permutations of 1..n with displacements restricted to {-4,-3,0,1,2}.at n=18A189581
• a(n) = [x^n] (1 + x + x^2 + x^3)^(4*n)/(1 + x + x^2)^(3*n).at n=10A351859