215233605

Appears in sequences

• a(n) = 5*3^n.at n=16A005030
• a(n) = n*3^n.at n=15A036290
• Least number with exactly n odd divisors.at n=33A038547
• Determinant of n X n matrix whose rows are cyclic permutations of 1..n.at n=8A052182
• a(n) = (2n-1) * 3^(2n-1).at n=7A060851
• Third column of triangle A067402.at n=9A067403
• Triangular array T(n,k) read by rows, giving number of labeled free trees such that the root is smaller than all its children, with respect to the number n of vertices and to the degree k of the root.at n=36A071210
• Coefficients of power series that satisfies A(x)^3 - 9*x*A(x)^4 = 1, A(0)=1.at n=8A078532
• a(n) = a(n-1) + a(n-2) + gcd(a(n-1), a(n-2)) for n > 1; a(0)=1, a(1)=1.at n=35A083658
• a(0)=1, a(1)=5, a(n) = -3*a(n-1), n>1.at n=17A084244
• Denominator of partial products in an approximation to Pi/2.at n=3A092799
• The least number k such that there are n different representations of k as the difference of two positive triangular numbers.at n=34A136108
• a(n) is the smallest positive integer that is coprime to n and has n divisors.at n=33A136641
• a(n) = 3*a(n-2) for n > 2; a(1) = 5, a(2) = 3.at n=32A162813
• a(n) = 3*a(n-2) for n > 2; a(1) = 1, a(2) = 5.at n=33A166465
• a(n) = n^8*(n + 1)/2.at n=9A168675
• a(n) is the least term of A326835 whose number of divisors is n.at n=33A348199
• Triangle related to the partitions of n in three colors, read by rows.at n=41A383348