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%I #13 Oct 02 2014 22:45:51
%S 1,4,4,9,9,16,16,16,25,25,36,36,36,49,49,49,64,64,64,64,81,81,81,81,
%T 100,100,100,100,100,121,121,121,144,144,144,144,169,169,169,169,169,
%U 169,196,196,196,196,225,225,225,225,225,225,256,256,256,256,256,256,289,289,289,289
%N The closest square to n-th prime.
%H Zak Seidov, <a href="/A246934/b246934.txt">Table of n, a(n) for n = 1..1000</a>
%e a(5) = 9 because 5th prime is 11, and 11-9<16-11, that is 9 is the closest square to 11.
%o (PARI){forprime (p = 2, 300, a = sqrtint (p); b = (a + 1)^2; a = a^2;
%o s = if (b - p > p - a, a, b); print1 (s ", "))}
%K nonn
%O 1,2
%A _Zak Seidov_, Oct 02 2014
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