27985

Appears in sequences

• Numbers k such that the continued fraction for sqrt(k) has period 53.at n=37A020392
• [ (4th elementary symmetric function of S(n))/(2nd elementary symmetric function of S(n)) ], where S(n) = {first n+3 positive integers congruent to 1 mod 4}.at n=15A024389
• Number of distinct products of subsets of integers in the interval [n^2+1, (n+1)^2-1] which are twice a square.at n=45A099500
• Divide the positive integers into subsets of lengths given by successive primes. a(n) is the sum of primes contained in the n-th subset.at n=30A344718
• Number of integer compositions of n with all prime parts and all prime run-lengths.at n=56A353429