529984

Appears in sequences

• Smallest nontrivial extension of n-th square which is a square not ending 00.at n=22A030688
• a(n) = Product_{d|n} (n/d + d).at n=11A045661
• Numbers whose square is expressible as the difference of positive cubes in more than one way.at n=6A051393
• Triangle read by rows: T(n,k) is the number of 2-stack sortable n-permutations with k runs.at n=60A082680
• Squares arising in A085039. n-th partial sum of A085039.at n=27A085040
• a(n) = ( n*(n+2) )^2.at n=26A099761
• Squares without a 0 digit and whose sum of digits minus 1 and product of digits plus 1 are both squares.at n=2A139565
• Squares such that square+-3=primes.at n=32A153262
• a(n) = ((n-1)^2*n^2*(n+1)^2)/6 - 2*Sum_{l=2..n}Sum_{k=2..n}(n-k+1)*(n-l+1)*(k-1)*(l-1).at n=13A169801
• Number of (n+1) X 2 binary arrays with no 2 X 2 subblock diagonal sum less antidiagonal sum equal to any horizontal or vertical neighbor 2 X 2 subblock diagonal sum less antidiagonal sum.at n=9A186842
• Numbers with prime factorization p^2*q^2*r^6 where p, q, and r are distinct primes.at n=17A190469
• Square numbers whose sum of square divisors is also square.at n=4A232554
• a(n+1) is next smallest square not divisible by 10 beginning with a(n), initial term is 5.at n=2A249895
• Numbers k such that k' = concat(s,t) and k = s*t, where k' is the arithmetic derivative of k.at n=22A272780
• Number of nX4 0..1 arrays with every element equal to 1, 2, 3 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=7A302666
• Obverse convolution A000032**A000032; see Comments.at n=5A374850