86683

Appears in sequences

• Number of positive integers <= 2^n of form 2*x^2 + 3*y^2.at n=19A000075
• Interprimes which are of the form s*prime, s=17.at n=32A075292
• Positions of check bits in code in A075937.at n=27A075939
• Number of nonnegative integer arrays of length n+4 with new values 0 upwards introduced in order, no three adjacent elements equal, and containing the value n+1.at n=25A211837
• Triangle read by rows: T(n,k) (n>=1, k>=0) is the number of posets with n elements and rank k (or depth k+1).at n=39A263859
• Numerator of best rational approximation x/y of log(k), y<=k, with k>1 given by A306975. The corresponding denominators are given in A306977.at n=19A306976