82374domain: NAppears in sequencesNumber of n-step spirals on hexagonal lattice.at n=24A006777a(n) = a(n-1) - a(n-2) + a(n-3) + a(n-4), a(0)=4, a(1)=1, a(2)=-1, a(3)=1.at n=45A073937Numbers k such that k and k+4 are consecutive cubefree numbers.at n=28A349235