44469

Appears in sequences

• Numbers k that divide s(k), where s(1)=1, s(j)=13*s(j-1)+j.at n=37A014861
• Numbers k such that k divides s(k), where s(1)=1, s(j) = s(j-1) + j*13^(j-1).at n=17A014953
• Gaps of 10 in sequence A038593 (upper terms).at n=20A038660
• Numerators of continued fraction convergents to sqrt(761).at n=8A042466
• Numbers n such that the sum of the sum-of-divisors function of all integers up to n is a square.at n=7A130698
• Base-2 logarithm of (n-th even superperfect number divided by 2^n).at n=26A134712
• Numbers k such that k and k^2 use only the digits 1, 4, 6, 7 and 9.at n=11A137053
• a(n) = 61*n^2.at n=27A174333
• Monotonic ordering of nonnegative differences 6^i-3^j, for 40>= i>=0, j>=0.at n=29A192152
• Numbers of ways in which a unit disc can be dissected into 6n curvilinear triangles, at least one of which does not contain the center.at n=37A193362
• The first of three triangles counting 3-colored alternating permutations by their last value.at n=21A202692
• The first of three triangles counting 3-colored alternating permutations by their last value.at n=22A202692
• The first of three triangles counting 3-colored alternating permutations by their last value.at n=29A202692
• Number of maximal matchings in the n-prism graph.at n=13A284703
• Triangle read by rows formed from the coefficients in ascending order of the characteristic polynomial of the n X n matrix M(n) with entries M(n)[i,j] = i*j mod n+1.at n=40A350710
• First differences of cubes of triangular numbers.at n=9A357178
• G.f. satisfies A(A(A(x))) = F(x), where F(x) is the g.f. for A053540(n) = n*9^(n-1).at n=7A372499
• a(n) = Sum_{k=1..n} sigma_2( (n/gcd(k,n))^2 ).at n=8A372996
• a(n) = 3^(n-2)*(binomial(n,2) + 3*n + 9).at n=8A382618
• Odd numbers k such that k/(1+A347381(k)) obtains record values, where A347381 gives the distance from n to the nearest common ancestor of n and sigma(n) in the Doudna-tree.at n=27A386423