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A195120 a(n) = 2*n - floor(n*sqrt(3)). 2
0, 1, 1, 1, 2, 2, 2, 2, 3, 3, 3, 3, 4, 4, 4, 5, 5, 5, 5, 6, 6, 6, 6, 7, 7, 7, 7, 8, 8, 8, 9, 9, 9, 9, 10, 10, 10, 10, 11, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 14, 15, 15, 15, 16, 16, 16, 16, 17, 17, 17, 17, 18, 18, 18, 18, 19, 19, 19, 20, 20, 20, 20, 21, 21, 21 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,5

LINKS

Vincenzo Librandi, Table of n, a(n) for n = 0..10000

PROG

(MAGMA) [2*n-Floor(n*Sqrt(3)): n in [0..70]]; // Vincenzo Librandi, Sep 12 2011

CROSSREFS

Sequence in context: A328301 A129253 A008652 * A259506 A305817 A091226

Adjacent sequences:  A195117 A195118 A195119 * A195121 A195122 A195123

KEYWORD

nonn

AUTHOR

Clark Kimberling, Sep 09 2011

STATUS

approved

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Last modified January 19 12:48 EST 2020. Contains 331049 sequences. (Running on oeis4.)