19677

Appears in sequences

• Expansion of 1/((1-x)*(1-2x)*(1-11x)).at n=4A016206
• Numbers n such that sigma(phi(n)) = sum of anti-divisors of n.at n=5A074835
• Numbers k such that 4*10^k + 6*R_k - 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=26A099005
• <h[d+1,d-1],s[d,d]*s[d,d]*s[d,d]> where h[d+1,d-1] is a homogeneous symmetric function, s[d,d] is a Schur function indexed by two parts, * represents the Kronecker product and <, > is the standard scalar product on symmetric functions.at n=35A115376
• Monotonic ordering of nonnegative differences 3^i-6^j, for 40>= i>=0, j>=0.at n=32A192151
• Numbers which do not reach zero under either of the iterations: x -> floor(sqrt(x)) * (x - floor(sqrt(x))^2) or y -> ceiling(sqrt(y)) * (ceiling(sqrt(y))^2 - y).at n=22A219963
• Row 5 of A277710: Positions of 5's in A264977; positions of 10's in A277330.at n=38A277715
• Number of nonnegative solutions to (x_1)^2 + (x_2)^2 + ... + (x_6)^2 <= n.at n=47A341401
• Table read by antidiagonals: Place k equally spaced points on each side of a regular n-gon and join every pair of these n*k points by a chord; T(n,k) (n >= 3, k >= 0) gives the number of vertices in the resulting planar graph.at n=40A367302
• Number of multiplex juggling cards with n balls and capacity 3.at n=10A370306