110212domain: NAppears in sequences5-Smith numbers.at n=29A103126Let M(n) be the n X n matrix m(i,j)=min(i,j) for 1<=i,j<=n; then a(n) is the trace of M(n)^(-7).at n=33A114359Templates for lunar primes in any base (version 1).at n=29A171750Templates for lunar primes in any base (version 3).at n=22A191420