312018

Appears in sequences

• Squarefree part of n!: n! divided by its largest square divisor.at n=26A055204
• Squarefree part of ((2n-1)!)^(2n-3).at n=13A197880
• Values of n such that n^2 + (n-d)^2 is prime for a record first value of d.at n=27A239390
• n!/pp, where pp is the largest perfect power (A001597) which divides n!.at n=27A251753
• a(n) is the least term in the n-th row of A360298.at n=26A360300
• For any n > 0, let b_n(n+1) = 1, and for k = 1..n, if k divides b_n(k+1) then b_n(k) = b_n(k+1) / k otherwise b_n(k) = b_n(k+1) * k; a(n) = b_n(1).at n=26A374317
• a(n) = (A388289(n)^2 - 1)/(3*2^5), for n >= 1.at n=5A389354