90792domain: NAppears in sequencesGaps of 10 in sequence A038593 (upper terms).at n=29A038660Numbers k such that 2*10^k + 4*R_k - 1 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=17A102953a(n) = floor(1/{(10+n^4)^(1/4)}), where {}=fractional part.at n=60A184634