34160

Appears in sequences

• a(n) = Sum_{k=1..n-1} k*sigma(k)*sigma(n-k).at n=19A000441
• Glaisher's function V(n).at n=34A002611
• Numbers n such that z(n) and z(n+1) are both prime, where z(n) = a^d + b^d + c^d + ..., where a*b*c* ... is the prime factorization of n and d is the largest digit of n.at n=23A109280
• Numbers n such that p(9n) is prime, where p(n) is the number of partitions of n.at n=33A114169
• Expansion of (x^2)/(1-2*x-x^2+x^3)^2.at n=12A189426
• Number T(n,k) of defective (binary) heaps on n elements with k defects; triangle T(n,k), n>=0, 0<=k<=max(0,n-1), read by rows.at n=39A306343
• Number T(n,k) of defective (binary) heaps on n elements with k defects; triangle T(n,k), n>=0, 0<=k<=max(0,n-1), read by rows.at n=43A306343
• Number of defective (binary) heaps on n elements with exactly two defects.at n=7A323958
• Number of defective (binary) heaps on n elements with exactly six defects.at n=3A323962
• Main diagonal of array in A358304, divided by 2.at n=43A358307
• Expansion of e.g.f. exp(-x^3/6)/(1-x).at n=8A370699