28533

Appears in sequences

• Semiprimes p such that next semiprime after p is p+20.at n=6A217335
• The number of regions formed inside 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=18A332953
• Number of subsets of {1..n} whose root mean square is an integer.at n=22A339454
• The reversing binary representation of the sum of the divisors of the n-th odd square: a(n) = A065621(A379223(n)).at n=42A379224