66702domain: NAppears in sequencesStarts of runs of 3 consecutive Niven numbers in base 2 (A049445).at n=30A330932Starts of runs of 4 consecutive Niven numbers in base 2 (A049445).at n=3A330933Number of subsets of {1..n} with elements disjoint from first differences of elements.at n=19A364463