205209

Appears in sequences

• Squares having last digit equal to the sum of the other digits.at n=10A054259
• a(n) = A001609(n)^2, where g.f. of A001609 is x*(1+3*x^2)/(1-x-x^3).at n=15A218439
• Squares whose arithmetic mean of digits is 3 (i.e., the sum of digits is 3 times the number of digits).at n=18A316483