76168

Appears in sequences

• a(n) = Sum_{k=0..n} C(2*n-2*k,n-k)^2 * C(2*n,k)^2.at n=4A036915
• Number of ways to partition 1 into distinct reduced fractions i/j with j <= n.at n=28A154888
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 779", based on the 5-celled von Neumann neighborhood.at n=39A273540
• Numbers that are the sum of three positive cubes in four or more ways.at n=6A343968
• Numbers that are the sum of three positive cubes in exactly 4 ways.at n=6A343969
• a(n) is the smallest number which can be represented as the sum of n distinct positive cubes in exactly 2 ways, or -1 if no such number exists.at n=21A374417