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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

N. J. A. Sloane

STATUS

approved

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Last modified April 24 16:59 EDT 2017. Contains 285346 sequences.