33820

Appears in sequences

• Numbers k such that (k, sigma(k)) lies on a circle with integral radius centered at the origin, i.e., k^2 + sigma(k)^2 is a square.at n=27A066764
• Sum of smallest parts (counted with multiplicity) of all compositions of n.at n=13A097940
• Structured truncated cubic numbers.at n=18A100152
• Consider any concatenation of the type n = concat(a,b). Sequence lists numbers that are the sum of the products of some of such couples a and b.at n=34A265737
• Number of maximal subsets of {1..n} containing n such that every subset has a different sum.at n=40A325867