66703

Appears in sequences

• Terms k of A002977 such that both (k-1)/2 and (k-1)/3 are also terms of A002977.at n=19A085249
• Number of points that are the intersections of exactly two semicircles in the configuration A290447(n).at n=39A292103
• Starts of runs of 3 consecutive Niven numbers in base 2 (A049445).at n=31A330932