41334

Appears in sequences

• usigma(n) = 2n + d(n), where d(n) is the number of divisors of n.at n=21A063829
• Number of disconnected antichain covers of a labeled n-set.at n=5A120338
• Integers having ideal digital mean up to base 5.at n=24A144800
• Number of nX4 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X5 binary array having a sum of zero, with rows and columns of the latter in lexicographically nondecreasing order.at n=7A227123
• T(n,k)=Number of nXk 0,1 arrays indicating 2X2 subblocks of some larger (n+1)X(k+1) binary array having a sum of zero, with rows and columns of the latter in lexicographically nondecreasing order.at n=58A227125
• Differences of the increasing arithmetic progression a^2+a, b^2+b, c^2+c, where b = 5*a+2, c = 7*a+3 and a >= 0.at n=41A260955
• Numbers k such that s(k) = 2*k, where s(k) is the sum of divisors of k that have a square factor (A162296).at n=26A322609
• Number of Motzkin meanders of length n with an odd number of humps and without peaks.at n=13A325919
• Triangle read by rows where T(n,k) is the number of antichains of nonempty sets covering n vertices with vertex-connectivity exactly k.at n=21A327351
• Primitive terms of A051487.at n=22A346694
• Numbers k such that sigma(k) = psi(k) + tau(k).at n=44A387953