25861

Appears in sequences

• Expansion of 1/(1-x+x^2-2*x^3).at n=36A077951
• Expansion of 1/(1+x+x^2+2*x^3).at n=36A077976
• Number of positive integers <= 10^n that are divisible by no prime exceeding 7.at n=14A106600
• a(n) = Sum_{k<=n} A007955(k) * A000027(k) = Sum_{k<=n} A007955(k) * k, where A007955(m) = product of divisors of m.at n=13A174935
• Sum over all permutations of [n] of the length of the longest increasing subsequence raised to the power of the length of the longest decreasing subsequence.at n=5A321276