155573domain: NAppears in sequencesNumbers n such that A078142(n) = A078142(n+1) = A078142(n+2), where A078142(n) is the sum of the differences of the distinct prime factors p of n and the next square larger than p.at n=25A073938Number of permutations of [n] avoiding {2143, 3412, 1234}.at n=20A294709