280904

Appears in sequences

• Numerators of continued fraction convergents to sqrt(432).at n=11A041822
• Numbers whose square is both a sum and a difference of two positive cubes.at n=35A230716
• Number of perfect matchings on a Möbius strip of width 3 and length 2n.at n=7A263200
• a(n) = ((1 - sqrt(3))^n + (1 + sqrt(3))^n)/2^floor((n - 1)/2); n-th row common denominator of A321118.at n=18A321119
• Nondeficient numbers k such that phi(k) = phi(sigma(k)) and A003958(k) = A003958(sigma(k)).at n=1A353634