20744

Appears in sequences

• Number of permutations according to distance.at n=13A002525
• Numbers k such that the least term in the periodic part of the continued fraction for sqrt(k) is 36.at n=7A031714
• Numerators of continued fraction convergents to sqrt(19).at n=10A041028
• Row sums of A102416.at n=13A103179
• Numbers n such that p1=2n+3, p2=4n+5, p3=6n+7 and p4=8n+9 are all prime.at n=15A105653
• a(n) = 64*n^2 + 8.at n=17A158488
• Number of triple-crossings of diagonals in the regular 2n-gon.at n=22A260417
• Number of n X 3 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors.at n=4A283410
• Number of n X 5 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors.at n=2A283412
• T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors.at n=23A283415
• T(n,k)=Number of nXk 0..1 arrays with no 1 equal to more than three of its horizontal, vertical and antidiagonal neighbors.at n=25A283415
• Numbers m for which p(m, 2)*p(m, 5) = p(m, 10), where p(m, b) is the period of repeating digits of 1/m in base b.at n=15A334488