28391

Appears in sequences

• a(n) = 15*n*(n+1) + 11.at n=43A132208
• a(n) = 42*n^2 - 1.at n=25A158626
• Composite squarefree numbers n such that p(i)-9 divides n+9, where p(i) are the prime factors of n.at n=46A225709
• Numbers n such that n^10+10 is prime.at n=42A239347
• First numbers E = a(n) of two non-consecutive numbers (E, F) different from (C, D) = (A352222(n), A352223(n)), such that the sums of their cubes are equal to centered cube numbers and to at least one other sum of two cubes, i.e. A = B^3 + (B+1)^3 = C^3 + D^3 = E^3 + F^3.at n=10A352224
• The maximal norm of an additively indecomposable element in Shanks' simplest cubic field Q[x]/(x^3 - n*x^2 - (n+3)*x - 1).at n=28A387575