666666666667domain: NAppears in sequencesNumbers k such that k^2 contains only digits {4,8,9}.at n=24A053966Number of Fibonacci numbers A000045(k), k <= 10^n, which end in 4.at n=13A067275Duplicate of A067275.at n=13A073552Numbers n > 2 such that n divides the concatenation of n-2 and n-1.at n=14A088797