88724domain: NAppears in sequencesNumbers of the form q-p, where p and q are prime and q = p^0+p^1+p^2+..+p^k for some k.at n=21A166388a(0)=0, a(1)=1, a(2n)=17*a(n), a(2n+1)=a(2n)+1.at n=29A197351Number of partitions of n with at most five part sizes.at n=48A364809