18600435

Appears in sequences

• Expansion of (-1+1/(1-3*x)^3)/(9*x).at n=12A036068
• Triangle whose (i,j)-th entry is binomial(i,j)*9^(i-j)*5^j.at n=29A038295
• Reduced denominators of the central moments of the distribution of random line segments picked on a unit line segment.at n=11A103308
• Least term of A004767 with exactly 2n divisors.at n=25A204086
• A variant of Look and Say sequence (A005150) based on exponents in prime factorization of n (see Comments section for precise definition).at n=40A356008
• a(n) is the least k that has exactly n divisors whose arithmetic derivative is odd.at n=26A363483