185460

Appears in sequences

• Numbers n such that sigma(n) = m*sigma(n+2) with some m > 1.at n=7A260988
• 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=48A306343
• 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=53A306343
• Number of defective (binary) heaps on n elements with exactly two defects.at n=8A323958
• Number of defective (binary) heaps on n elements with exactly seven defects.at n=3A323963