278783

Appears in sequences

• Numbers n such that core(n)=floor(sqrt(n)), where core(x)=A007913(x) is the squarefree part of x and floor(sqrt(x))=A000196(x).at n=30A069186
• a(n) = (n-1)*(n+2)*(n^2 + n + 2)/4.at n=31A168566
• a(n) = (n^2-1)^2-1.at n=23A178392
• Numbers such that the minimum distance between divisors of n occurs only between composite numbers.at n=12A253266
• Starts of runs of 3 consecutive base phi Niven numbers (A334308).at n=27A334310