216225

Appears in sequences

• Sum of first n cubes; or n-th triangular number squared.at n=30A000537
• Squares of odd triangular numbers.at n=15A014736
• a(n) = Sum_{k=1..n, gcd(n,k) = 1} k^3.at n=30A053819
• Squares containing 2k digits in which the sum of the first k digits = that of the rest.at n=10A068897
• Smallest square divisible by the n-th triangular number (n(n+1)/2).at n=29A085037
• a(n) = A000931(n)^2.at n=28A133037
• Squares such that another square can be obtained by a cyclic permutation of the digits, excluding leading zeros.at n=22A135780
• Perfect squares that are a product of two triangular numbers.at n=36A169835
• Number of 2 X n 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 0 1 and 1 0 1 vertically.at n=13A207069
• Odd half-Zumkeller numbers.at n=28A246199
• 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=27A250813
• Product_{i=0..3} (2^floor((n+i)/4)-1).at n=18A274627
• Sum of the cubes of the parts in the partitions of n into two parts.at n=30A294270
• Sum of the cubes of the parts in the partitions of n into two distinct parts.at n=30A294287
• Number of minimal total dominating sets in the n-path graph.at n=45A302655
• Squares whose arithmetic mean of digits is 3 (i.e., the sum of digits is 3 times the number of digits).at n=21A316483
• Triangle read by rows. T(n, k) = A356265(n, k) + A357078(n, k) for 0 <= k <= n.at n=46A357079
• Odd squares k for which A379113(k) > 1, i.e., k that have a proper unitary divisor d > 1 such that A048720(A065621(sigma(d)),sigma(k/d)) is equal to sigma(k).at n=7A379121