494209

Appears in sequences

• Sum of first n cubes; or n-th triangular number squared.at n=37A000537
• Squares of odd triangular numbers.at n=18A014736
• Squares of odd hexagonal numbers.at n=9A014771
• a(n) = n^4 - 2*n^3 + 3*n^2 - 2*n + 1, the Alexander polynomial for reef and granny knots.at n=27A058031
• Numbers k having exactly one divisor d such that in binary representation d and k/d have the same number of 1's as k.at n=27A080026
• Smallest square divisible by the n-th triangular number (n(n+1)/2).at n=36A085037
• Numbers n that can be chopped into two parts, which when added and squared result in n.at n=8A102766
• Numbers which when chopped into one, two or more parts, added and squared result in the same number.at n=19A104113
• Number of n X 3 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 0 1 and 0 1 1 vertically.at n=35A207363
• Numbers which when chopped into two parts with equal length, added and squared result in the same number.at n=4A238237
• Number of (1+1) X (n+1) 0..2 arrays with nondecreasing x(i,j)-x(i,j-1) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.at n=34A250813
• Squares representable as k*m + k + m, where k >= m > 1 are squares.at n=35A256074
• Composite numbers m such that tau_k(m) = m for some k, where tau_k is the k-th Piltz divisor function (A077592).at n=22A327774
• Discriminants with exactly 2 associated cyclic cubic fields.at n=24A343002
• Discriminants with at least 2 associated cyclic cubic fields.at n=24A343024
• Number of n-chains of divisors of n.at n=35A343939
• Numbers k = x.y such that x.y = (x+y)^2, when x and y have the same number of digits, "." means concatenation, and y may not begin with 0.at n=3A350870
• Numbers k for which nonnegative integers x and y exist such that k is the concatenation of x and y as well as k = (x + y)^2.at n=5A380428