58706

Appears in sequences

• a(n) = floor( n*(n-1)*(n-2)*(n-3)/27 ).at n=37A011937
• Numbers k such that the continued fraction for sqrt(k) has odd period and if the last term of the periodic part is deleted the two central terms are both 19.at n=20A031607
• Monotonic ordering of nonnegative differences 3^i-7^j, for 40>= i>=0, j>=0.at n=32A192153
• a(n) = n + (n-1)*(n-2) + (n-3)*(n-4)*(n-5) + (n-6)*(n-7)*(n-8)*(n-9) + ... + ...*(n-n).at n=20A227363
• Number of positive integers with n digits and final digit 9 that are equal to the product of two integers ending with the same digit.at n=5A348547