56025domain: NAppears in sequencesHeptagonal numbers for which the sum of the digits is also a heptagonal number.at n=38A117650Number of (w,x,y,z) with all terms in {1,...,n} and w<=2x and y<=3z.at n=17A212513a(n) = number of partitions p of n such that the greatest multiplicity of the parts of p is a part of p.at n=48A365613