106316domain: NAppears in sequencesSum of squared terms in rows of the Padovan-Fibonacci triangle A152545.at n=17A152546Numbers n such that if n = a U b (where U denotes concatenation) then sigma*(a) + sigma*(b) = abs(sigma*(n) - n), where sigma*(n) is the sum of the anti-divisors of n.at n=21A239686