A212456 a(n) = floor(3n*log(3n)).

3, 10, 19, 29, 40, 52, 63, 76, 88, 102, 115, 129, 142, 156, 171, 185, 200, 215, 230, 245, 261, 276, 292, 307, 323, 339, 355, 372, 388, 404, 421, 438, 454, 471, 488, 505, 522, 539, 557, 574, 591, 609, 626, 644, 662, 679

Offset: 1

Author

Mohammad K. Azarian, May 31 2012

Keywords

• easy
• nonn

Links

• Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A050502, A050504, A212455, A212457, A212458, A212459, A212460, A212461, A212462.

Programs

Derive

PROG(y := [], x := 100, LOOP(IF(x = 0, RETURN y), y := ADJOIN(FLOOR(3·x·LOG(3·x)), y), x := x - 1))

Magma

[Floor(3*n*Log(3*n)): n in [1..80]]; // Vincenzo Librandi, Feb 13 2013

Mathematica

Table[Floor[3*n*Log[3*n]], {n, 60}] (* Vincenzo Librandi, Feb 13 2013 *)

PARI

a(n)=3*n*log(3*n)\1 \\ Charles R Greathouse IV, Sep 04 2015