269990

Appears in sequences

• Number of (w,x,y,z) with all terms in {1,...,n} and 3w<x+y+z+n.at n=24A212249
• Unitary Zumkeller numbers (A290466) whose set of unitary divisors can be partitioned into two disjoint sets of equal sum in a single way.at n=13A335202
• Primitive unitary abundant numbers k (A302573) whose unitary abundancy index usigma(k)/k has a record low value.at n=9A362054