562500

Appears in sequences

• a(n) = Product_{i=0..7} floor((n+i)/8).at n=42A009694
• Numbers of form 5^i*6^j, with i, j >= 0.at n=38A025622
• Squares which are the sum of twin prime pairs.at n=19A037072
• Numbers k such that the numerator of Sum_{d|k} 1/d > 3*k.at n=25A069096
• Product of terms of n-th group in A075383.at n=4A075387
• k^2 is a term if k^2 + (k-1)^2 and k^2 + (k+1)^2 are primes.at n=25A075577
• Initial values for f(x)=phi(sigma(x)) such that iteration of f ends in cycle of length=15.at n=14A096889
• Numbers n that are the hypotenuse of exactly 6 distinct integer-sided right triangles, i.e., n^2 can be written as a sum of two squares in 6 ways.at n=23A097219
• Perfect powers which are the sum of twin prime pairs.at n=22A119767
• a(n) = n^2*5^n.at n=6A128784
• Squares that remain squares if prefixed with a 1.at n=3A167035
• Squares that remain squares when prefixed with a 7.at n=3A167042
• Squares that remains a square when some single digit is inserted in front of its decimal expansion.at n=33A167045
• Totally multiplicative sequence with a(p) = 5*(p+3) for prime p.at n=35A167324
• Totally multiplicative sequence with a(p) = (p+3)^2 = p^2+6p+9 for prime p.at n=23A167363
• a(n) = (n/4)*5^(n/2)*((1+sqrt(5))^2+(-1)^n*(1-sqrt(5))^2).at n=12A187275
• Numbers with prime factorization p^2*q^2*r^6 where p, q, and r are distinct primes.at n=19A190469
• Sequence of distinct least squares such that the arithmetic mean of the first n squares is also a square.at n=17A236247
• Number of permutations of n elements divided by the number of quaternary heaps on n+1 elements.at n=33A273732
• Numbers that can be written in all bases from base 2 to base 6 using only the digits 0, 1 and 2.at n=17A275600