81150

Appears in sequences

• Number of (w,x,y,z) with all terms in {1,...,n} and w*x<=y*z+1.at n=20A212053
• Starts of runs of 3 consecutive tribonacci-Niven numbers (A352089).at n=35A352091
• Starts of runs of 3 consecutive Catalan-Niven numbers (A352508).at n=20A352510