174930

Appears in sequences

• G.f. 1/[Sum_{n>=0} (2*n+1)*(-x)^(n*(n+1)/2)].at n=10A202143
• Numbers n for which there exists k < n such that A000203(k) = A000203(n) and A007947(k) = A007947(n), where A000203 gives the sum of divisors, and A007947 gives the squarefree kernel of n.at n=25A255335
• The least number k > A255334(n) for which A000203(k) = A000203(A255334(n)) and A007947(k) = A007947(A255334(n)), where A000203 gives the sum of divisors, and A007947 gives the squarefree kernel of n.at n=25A255423
• Numbers n such that n is the average of four consecutive primes n-13, n-1, n+1 and n+13.at n=24A260959
• Expansion of o.g.f. x^3/((1-2*x)^3*(1-3*x)^2).at n=10A369421