27265

Appears in sequences

• Quotients k*(k+1)*(k+2) / (k+(k+1)+(k+2)) that are lucky numbers.at n=21A032792
• Numerators of continued fraction convergents to sqrt(211).at n=9A041392
• Numerators of continued fraction convergents to sqrt(358).at n=9A041678
• Number of degree-n permutations with pairwise coprime cycle lengths.at n=8A079129
• Number of n-digit terms in A048398.at n=19A182781
• a(n) is the smallest number such that there are exactly n numbers k (including a(n) itself) such that U(k) is isomorphic to U(a(n)) (or 0 if no such number exists). Here U(k) is the multiplicative group of integers modulo k.at n=35A303712
• Squarefree numbers k such that the sum of the distinct prime factors of k is twice the difference between the largest and the smallest prime factors of k.at n=28A324210
• a(n) = (16/3) * squared area of a triangle with sides prime(n), prime(n+1), and prime(n+2).at n=4A330096
• a(n) = A351477(n) * FB where F is the Fermat point of a primitive integer-sided triangle ABC with A < B < C < 2*Pi/3 and FA + FB + FC = A336329(n).at n=3A351802
• a(n) is the smallest number which can be represented as the sum of n distinct centered n-gonal numbers in exactly n ways, or -1 if no such number exists.at n=16A352975
• Composite squarefree integers for which the sum of the squares of their factors is a square.at n=19A379780
• a(n) is the number of 2 X 2 matrices with elements 1..n where at least one row and at least one column is strictly increasing.at n=15A390922