127539

Appears in sequences

• Triangle of D-analogs of Stirling numbers of first kind.at n=29A039762
• Triangle of D-analogs of Stirling numbers of first kind, rows reversed.at n=34A039763
• Numerators of continued fraction convergents to sqrt(199).at n=9A041368
• Pairs (x, y), x < y, of f-amicable numbers where f(k) = floor(|k*sin(k)|) sorted by increasing y, then increasing x; f-amicable numbers are defined in A066511.at n=17A066573
• Second member of a pair of numbers occurring in the definition of 2-happy couples.at n=60A191863
• Positive fundamental solution x(n) of the generalized Pell equation X^2 - D(n) Y(n) = 2 with D(n) = A261246(n).at n=22A261247
• x-value of the smallest solution to x^2 - p*y^2 = 2*(-1)^((p+1)/4), p = A002145(n).at n=23A306529
• Number of non-isomorphic phylogenetic trees with n nodes.at n=25A330627
• Incrementally largest values of minimal x satisfying the equation x^2 - D*y^2 = 2, where D is a prime number.at n=8A336787