Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #19 Mar 06 2023 20:40:23
%S 0,3,8,26,32,46,54,92,115,199,268,306,326,368,390,436,796,828,861,963,
%T 1071,1146,1304,1345,1429,1472,1560,2193,2246,2300,2465,2636,2873,
%U 2995,3120,3312,3377,3443,3713,3782,3922,3993,4137,4738,4816,5297,6062,6239
%N Numbers k such that floor(Pi*k) is a square.
%H Harry J. Smith, <a href="/A061812/b061812.txt">Table of n, a(n) for n = 0..1000</a>
%e Floor(Pi*861) = 2704 = 52^2, so 861 is a term;
%e floor(Pi*1146) = 3600 = 60^2, so 1146 is a term.
%t Select[Range[0,7000],IntegerQ[Sqrt[Floor[Pi #]]]&] (* _Harvey P. Dale_, May 14 2011 *)
%o (PARI) for(n=0,1200, if(issquare(floor(Pi*n)),print(n)))
%o (PARI) { n=-1; for (a=0, 3714376, if (issquare(floor(Pi*a)), write("b061812.txt", n++, " ", a)) ) } \\ _Harry J. Smith_, Jul 28 2009
%Y Cf. A022844.
%K easy,nice,nonn
%O 0,2
%A _Jason Earls_, Jul 01 2001
%E More terms from _Naohiro Nomoto_, Oct 04 2001