76739domain: NAppears in sequencesNumbers k that divide 10^k + 3^k.at n=7A0455891/3 of the number of permutations of 2 indistinguishable copies of 1..n with exactly 6 local maxima.at n=5A152498Numbers n with the property that n^2 contains a sequence of four or more consecutive 8's.at n=38A301938