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A212460 a(n) = ceiling(3n*log(3n)). 8
4, 11, 20, 30, 41, 53, 64, 77, 89, 103, 116, 130, 143, 157, 172, 186, 201, 216, 231, 246, 262, 277, 293, 308, 324, 340, 356, 373, 389, 405, 422, 439, 455, 472, 489, 506, 523, 540, 558, 575, 592, 610, 627, 645, 663, 680 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

FORMULA

a(n) = A050502(3*n). - Michel Marcus, Jan 11 2016

MATHEMATICA

Table[Ceiling[3*n*Log[3*n]], {n, 80}] (* _Vincenzo Liobrandi_, Feb 13 2013 *)

PROG

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

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

(PARI) a(n) = ceil(3*n*log(3*n)); \\ Michel Marcus, Jan 11 2016

CROSSREFS

Cf. A050502, A050504, A212455, A212456, A212457, A212458, A212459, A212461, A212462.

Sequence in context: A047961 A301114 A301113 * A159801 A008245 A002441

Adjacent sequences:  A212457 A212458 A212459 * A212461 A212462 A212463

KEYWORD

easy,nonn

AUTHOR

Mohammad K. Azarian, May 31 2012

STATUS

approved

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Last modified August 6 19:52 EDT 2020. Contains 336256 sequences. (Running on oeis4.)