100368

Appears in sequences

• Numbers n with property that n sets a new record for the length of the preperiodic part of the 'Reverse and Subtract' trajectory of n.at n=10A072146
• Janet periodic table of the elements and structured hexagonal diamond numbers. a(n) = A166911(2*n) + A166911(2*n+1).at n=16A167471
• The number of edges formed on an isosceles triangle by straight line segments mutually connecting all vertices and all points that divide the two equal length sides into n equal parts; the base of the triangle contains no points other than its vertices.at n=21A333027
• a(n) = Sum_{k=0..floor(n/4)} binomial(n+3,4*k+3) * Catalan(k).at n=15A360046
• a(n) is the first number that has exactly n anagrams that each have exactly n prime divisors, counted by multiplicity.at n=9A369203
• Integers k with at least one proper factorization for which the sum of the same fixed integer power >= 2 of the factors equals k.at n=28A380760
• Integers k with at least 1 proper factorization for which the sum of the squares of the factors equals k.at n=12A380902