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 A065737 Largest square <= binomial(n,2). 1
 0, 1, 1, 4, 9, 9, 16, 25, 36, 36, 49, 64, 64, 81, 100, 100, 121, 144, 169, 169, 196, 225, 225, 256, 289, 324, 324, 361, 400, 400, 441, 484, 484, 529, 576, 625, 625, 676, 729, 729, 784, 841, 900, 900, 961, 1024, 1024, 1089, 1156, 1225 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 LINKS Harry J. Smith, Table of n, a(n) for n = 1..1000 FORMULA a(n) = A048760(binomial(n,2)). MATHEMATICA Floor[Sqrt[#]]^2&/@Binomial[Range[50], 2] (* Harvey P. Dale, Feb 28 2020 *) PROG (PARI) { for (n=1, 1000, a=sqrtint(binomial(n, 2))^2; write("b065737.txt", n, " ", a) ) } \\ Harry J. Smith, Oct 28 2009 CROSSREFS Cf. A048760, A000217, A065730-A065741. Sequence in context: A186887 A140978 A106410 * A014719 A139417 A329732 Adjacent sequences:  A065734 A065735 A065736 * A065738 A065739 A065740 KEYWORD easy,nonn AUTHOR Labos Elemer, Nov 15 2001 STATUS approved

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Last modified May 7 16:00 EDT 2021. Contains 343652 sequences. (Running on oeis4.)