67333domain: NAppears in sequencesa(n) = Sum_{k=0..n} (k*n)^k.at n=4A155956Starhex honeycomb numbers: a(n) = 13 + 60*n + 60*n^2.at n=33A332243a(n) = Sum_{k=1..n} binomial(n,k) * sigma_3(k).at n=8A356039