8643600

Appears in sequences

• Square numbers which equal a triangular number times an odd number between 1 and 15.at n=18A094973
• Squares that are equal to the sum of 5 consecutive cubes.at n=5A116145
• Squares which can be represented as sum of (at least two) consecutive cubes and are not triangular numbers squared.at n=9A163392
• Perfect squares that are a product of two distinct triangular numbers.at n=17A169836
• Triangle read by rows: Bell polynomial of the second kind B(n,k) with argument vector (7, 42, 210, 840, 2520, 5040, 5040).at n=22A188066
• Numbers n such that phi(sigma(k))/sigma(phi(k)) < phi(sigma(n))/sigma(phi(n)) for all k < n and n is the smallest positive integer with this property.at n=10A227927
• Integer squares c^2 that are equal to the sum of an odd number M of consecutive cubed integers b^3 + (b+1)^3 + ... + (b+M-1)^3 = c^2 starting at b(n) (A253679).at n=1A253681
• Magic sums of 3 X 3 semimagic squares of squares whose rows, columns, and at least one of the two main diagonals sum to the same number.at n=27A271021
• Numbers n such that phi(sigma(n))/n > phi(sigma(m))/m for all m < n, where sigma is the sum of divisors function (A000203) and phi is Euler's totient function (A000010).at n=12A293708
• Numbers k where the ratios A099378(k)/k reach a record value.at n=15A348847