980100

Appears in sequences

• Squares of even triangular numbers.at n=21A014738
• a(n) = n^2 * (n+1)^2 * (n+2)^2 = 36*A001249(n-1).at n=9A099764
• Numbers which when chopped into one, two or more parts, added and squared result in the same number.at n=26A104113
• a(n) is the smallest number representable in exactly n ways as a sum of 2 powerful(1) numbers.at n=32A115354
• Refactorable numbers k such that the number of odd divisors r is odd, the number of even divisors s is even and both r and s are divisors of k.at n=14A120349
• Non-palindromic squares whose digit reversal gives a square (possibly with fewer digits).at n=30A161902
• Number of n X 7 binary arrays without the pattern 0 1 diagonally or antidiagonally.at n=31A188822
• Number of 4 X n binary arrays without the pattern 0 1 diagonally or antidiagonally.at n=10A188826
• Number of 5Xn 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 0 1 and 1 1 0 vertically.at n=7A207706
• Number of nX6 0..1 arrays avoiding 0 0 0 and 0 1 0 horizontally and 0 1 0 and 1 1 1 vertically.at n=12A209222
• Areas of primitive Heronian triangles K which are perfect squares.at n=23A248108