532480

Appears in sequences

• Numbers k such that neither 4 nor 9 divides binomial(2k-1,k) (almost certainly finite).at n=30A051404
• Row sums of triangle A118438.at n=13A118440
• a(n) = n^7*(n^3 + 1)/2.at n=4A168660
• Define the array k(n,x) = number of m such that tau(gcd(n,m)) is x where m runs from 1 to n. Also define h(n,x) = Sum_{d|n : tau(d) = x} d. The sequence contains numbers n such that k(n,x)*x = h(n,x) has at least one solution x.at n=27A197099
• Number of (n+2)X(n+2) 0..3 arrays with every consecutive three elements in every row and column not having exactly two distinct values, and in every diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order.at n=17A253017
• Values of A007692(n) that are not of the form x^2 + y^2 + z^2 where x, y, z are nonzero integers.at n=13A273123
• Number of permutations of n elements divided by the number of ternary heaps on n+1 elements.at n=27A273731
• Expansion of x*(1 + x)/(1 - 2*x)^3.at n=13A276289
• Decimal representation of the x-axis, from the left edge to the origin, of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 260", based on the 5-celled von Neumann neighborhood.at n=19A280373
• Decimal representation of the diagonal from the corner to the origin of the n-th stage of growth of the two-dimensional cellular automaton defined by "Rule 260", based on the 5-celled von Neumann neighborhood.at n=58A287285
• Median of 2^X + 2^Y where X and Y are independent random variables with B(n,1/2) distributions.at n=33A288346
• a(n) = Product_{k=0..n} (n^6 + k^6).at n=2A367823