378225

Appears in sequences

• Least square base n doublet (written in base 10).at n=2A020340
• For the numbers k that can be expressed as k = w+x = y*z with w*x = (y+z)^2 where w, x, y, and z are all positive integers, this sequence gives the corresponding values of w*x.at n=28A057442
• Squares which repeat with at least two full periods when written in base 4.at n=1A071130
• Squares whose decimal digits are nonsquares (2, 3, 5, 6, 7, 8).at n=28A077437
• a(n) = n^2*(n^3-n+2)/2.at n=15A101377
• Perfect squares among 17-gonal numbers A051869(k) = k*(15*k - 13)/2.at n=2A137878
• Numbers k such that k^k == 1 (mod sigma(k)).at n=24A181476
• Numbers whose sum of proper square divisors is a palindrome in base 10 having at least two digits.at n=27A232892
• Numbers n such that there exists an m so that squarefree kernel of n = squarefree kernel of m, and n is the sum of the proper divisors of m (m may equal n).at n=32A252234
• Number of (1+1)X(n+1) arrays of permutations of 0..n*2+1 with each element having index change +-(.,.) 0,0 0,2 or 1,1.at n=9A264111
• Number of nX4 0..4 arrays with every repeated value in every row and column greater than or equal to the previous repeated value.at n=1A268102
• T(n,k)=Number of nXk 0..k arrays with every repeated value in every row and column greater than or equal to the previous repeated value.at n=11A268103
• Number of 2Xn 0..n arrays with every repeated value in every row and column greater than or equal to the previous repeated value.at n=3A268105
• Number of nX4 0..4 arrays with every repeated value in every row greater than or equal to, and every column greater than, the previous repeated value.at n=1A268245
• T(n,k)=Number of nXk 0..k arrays with every repeated value in every row greater than or equal to, and every column greater than, the previous repeated value.at n=11A268246
• Square numbers of the form prime(k) + 2*prime(k+1).at n=24A284057