0,4

Vincenzo Librandi, Table of n, a(n) for n = 0..1000

a(n) = A171970(n). [R. J. Mathar, Feb 05 2010]

With[{c = Sqrt[3]/2}, Floor[c #] &/@ Range[0, 90]] (* Harvey P. Dale, Feb 07 2011 *)

(MAGMA) [Floor(n*Sqrt(3)/2): n in [0..80]]; // Vincenzo Librandi, Aug 01 2013

Sequence in context: A303789 A145569 A213851 * A171970 A071377 A076946

Adjacent sequences: A172472 A172473 A172474 * A172476 A172477 A172478

nonn,easy

Vincenzo Librandi, Feb 04 2010

approved