181201

Properties

Appears in sequences

• Numerators of continued fraction convergents to sqrt(906).at n=3A042750
• a(n) = 1250*n^2 + 100*n + 1.at n=11A154375
• a(n) = 5000*n^2 + 200*n + 1.at n=5A157511
• Number of permutations of length n in the class of juxtapositions of 321-avoiders with 21-avoiders.at n=10A278301
• Prime k with sigma(sigma(sigma(k))) < 3*k + 1.at n=34A320517
• Sum of the legs of the unique primitive Pythagorean triple whose inradius is A000217(n) and such that its long leg and its hypotenuse are consecutive natural numbers.at n=24A383834
• Prime numbersat n=16429