174725

Appears in sequences

• Smaller sides (a) in (a,a,a+1)-integer triangle with integer area.at n=5A103974
• a(n) = 3*a(n-1) + 3*a(n-2) - a(n-3); a(0)=1, a(1)=1, a(2)=5.at n=10A120893
• Hypotenuses of Pythagorean triples in A195499 and A195503.at n=8A195531
• Markoff spectrum N^(2)(Lambda).at n=17A293174
• Positive integers k such that (k+1)^4 has a divisor congruent to -1 modulo k.at n=53A350916