159895

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 69 ones.at n=13A031837
• Triangular numbers T such that sum of the factorials of digits of T is prime.at n=35A242831
• Triangular numbers representable as x*y+x+y such that x and y are triangular numbers, x>=y>0.at n=30A259745
• Triangular numbers representable as x*y+x+y such that x and y are triangular numbers, x>=y>1.at n=24A259746
• The phi-radical numbers: composite numbers m such that rad(phi(m)) = rad(m-1).at n=13A306478