39637

Appears in sequences

• Related to population of numbers of form x^2 + y^2.at n=17A000693
• Numbers k such that the continued fraction for sqrt(k) has period 99.at n=32A020438
• Row 3 of array in A047666.at n=38A047667
• Smallest number k such that M(n)^2+k*M(n)-1 is prime with M(n)= Mersenne primes =A000668(n).at n=27A139426
• Duplicate of A139426.at n=27A143384
• Number of nonempty subsets of {1, 2, ..., n} with <=6 pairwise coprime elements.at n=33A187267
• Begin with a(0) = 3. Let a(n) for n > 0 be the smallest positive integer not yet in the sequence which forms part of a Primitive Pythagorean Triple (PPT) when paired with a(n-1).at n=41A239356
• Number of equivalence classes of unimodular n X n matrices with elements {0, 1}.at n=5A363862