28187

Appears in sequences

• Numbers k such that the period of the continued fraction for sqrt(k) contains exactly 23 ones.at n=20A031791
• G.f. (x + 1)^10/(x^10 + x^9 - x^7 - x^6 - x^5 - x^4 - x^3 + x + 1).at n=36A173243
• Collatz trajectory starting at 3711.at n=10A179623
• Total number of parts of multiplicity 4 in all partitions of n.at n=42A222704
• 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 286", based on the 5-celled von Neumann neighborhood.at n=14A280563
• Numbers k such that sigma(phi(k))/k > sigma(phi(m))/m for all m < k, where sigma is the sum of divisors function (A000203) and phi is Euler's totient function (A000010).at n=20A293059
• Total number of distinct numbers that can be obtained by starting with 1 and applying the "Choix de Bruxelles", version 2 (A323460) operation at most n times.at n=12A323289
• Number of integer partitions of n whose mean is not an integer.at n=40A349156
• Expansion of 1 / ((1-x)^4 - x^5)^2.at n=10A392638