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Largest square <= sum of first n squares.
1

%I #13 Dec 13 2024 12:38:28

%S 1,4,9,25,49,81,121,196,256,361,484,625,784,961,1225,1444,1764,2025,

%T 2401,2809,3249,3721,4225,4900,5476,6084,6889,7569,8464,9409,10404,

%U 11236,12321,13456,14884,16129,17424,18769,20449,21904,23716,25281

%N Largest square <= sum of first n squares.

%H Harry J. Smith, <a href="/A065739/b065739.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = A048760(A000330(n)).

%o (PARI) a(n) = { sqrtint(n*(n+1)*(2*n+1)/6)^2 } \\ _Harry J. Smith_, Oct 29 2009

%Y Cf. A048760, A000330, A065730-A065741.

%K easy,nonn

%O 1,2

%A _Labos Elemer_, Nov 15 2001