22899

Appears in sequences

• Numerators of continued fraction convergents to sqrt(458).at n=5A041872
• Triangle: self-converse semigroups of order n with k idempotents.at n=21A058118
• Number of self-converse semigroups of order n with 1 idempotent.at n=6A058119
• Numbers n such that sigma(n) and sigma(sigma(n)) are both perfect squares.at n=30A134263
• a(n) = 1250*n^2 - 1800*n + 649.at n=5A154358
• Numbers of the form x^2 + y^2 + z^2 = phi(x*y*z) + sigma(x*y*z).at n=29A173792
• Product of n and the sum of remainders of n mod k, for k = 1, 2, 3, ..., n.at n=50A256532
• Coordination sequence for (2,5,5) tiling of hyperbolic plane.at n=26A265064
• a(n) = Sum_{-n<i<n, -n<j<n, gcd{i,j}=3} (n-|i|)*(n-|j|)/4.at n=33A331775