5241856domain: NAppears in sequencesBinomial transform of A081250.at n=11A084213Numbers k such that k = 6*phi(k) - sigma(k).at n=3A136539sigma(n) is an additive inverse of n modulo phi(n).at n=33A235989Expansion of (1 - 2*x + x^2 - x^4 + x^3 + x^5)/((1 - x)^2*(1 - 2*x + x^3 - x^4)).at n=24A290987