49832domain: NAppears in sequencesNumbers k such that k and k^2 use only the digits 2, 3, 4, 8 and 9.at n=23A137077Indices of prime Fibonacci 6-step numbers, A001592.at n=10A249635Number of compositions of n where every distinct subsequence (not necessarily contiguous) has a different sum.at n=47A334268