This site is supported by donations to The OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A008737 a(n) = floor(n/6)*ceiling(n/6). 1
 0, 0, 0, 0, 0, 0, 1, 2, 2, 2, 2, 2, 4, 6, 6, 6, 6, 6, 9, 12, 12, 12, 12, 12, 16, 20, 20, 20, 20, 20, 25, 30, 30, 30, 30, 30, 36, 42, 42, 42, 42, 42, 49, 56, 56, 56, 56, 56, 64, 72, 72, 72, 72, 72, 81, 90, 90, 90, 90, 90, 100 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,8 LINKS Vincenzo Librandi, Table of n, a(n) for n = 0..1000 Index entries for linear recurrences with constant coefficients, signature (2, -2, 2, -2, 2, 0, -2, 2, -2, 2, -2, 1). MATHEMATICA Table[Floor[n/6] Ceiling[n/6], {n, 0, 70}] (* Vincenzo Librandi, Dec 19 2016 *) PROG (MAGMA) [Floor(n/6)*Ceiling(n/6): n in [0..80]]; // Vincenzo Librandi, Dec 19 2016 CROSSREFS Sequence in context: A029103 A175732 A168260 * A244460 A160419 A152659 Adjacent sequences:  A008734 A008735 A008736 * A008738 A008739 A008740 KEYWORD nonn AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent | More pages
The OEIS Community | Maintained by The OEIS Foundation Inc.