18778

Appears in sequences

• a(n) = [ C(2n,n)/n^2 ].at n=11A024500
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted then there are a pair of central terms both equal to 8.at n=38A031421
• Numerators of continued fraction convergents to sqrt(869).at n=7A042678
• Greatest number having exactly n representations as ab+ac+bc with 1 <= a <= b <= c.at n=16A094380
• Numbers k such that Bernoulli number B_{k} has denominator 498.at n=26A282773
• Solution of the complementary equation a(n) = a(n-1) + a(n-2) + b(n-1) + b(n-2) + 2*n, where a(0) = 1, a(1) = 2, b(0) = 3, and (a(n)) and (b(n)) are increasing complementary sequences.at n=15A294558