A195179 a(n) = 5*n - floor(2*n*sqrt(2)).

0, 3, 5, 7, 9, 11, 14, 16, 18, 20, 22, 24, 27, 29, 31, 33, 35, 37, 40, 42, 44, 46, 48, 50, 53, 55, 57, 59, 61, 63, 66, 68, 70, 72, 74, 77, 79, 81, 83, 85, 87, 90, 92, 94, 96, 98, 100, 103, 105, 107, 109, 111, 113, 116, 118, 120, 122, 124, 126, 129, 131, 133, 135

Offset

0,2

Links

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

Formula

a(n) = A008587(n) - A022842(n). - Michel Marcus, Oct 31 2017

Mathematica

Table[5*n - Floor[2*n*sqrt(2)], {n, 0, 50}] (* G. C. Greubel, Oct 31 2017 *)

Prog

(Magma) [5*n-Floor(2*n*(Sqrt(2))): n in [0..70]]; // Vincenzo Librandi, Sep 12 2011
(PARI) a(n) = 5*n - floor(2*n*sqrt(2)) \\ G. C. Greubel, Oct 31 2017

Crossrefs

Cf. A008587, A022842.

Sequence in context: A327209 A285590 A376957 * A033038 A195167 A364668

Adjacent sequences: A195176 A195177 A195178 * A195180 A195181 A195182

Keyword

nonn,easy

Author

Clark Kimberling, Sep 10 2011

Status

approved