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A212461
a(n) = ceiling(4n*log(4n)).
8
6, 17, 30, 45, 60, 77, 94, 111, 130, 148, 167, 186, 206, 226, 246, 267, 287, 308, 330, 351, 373, 395, 417, 439, 461, 484, 506, 529, 552, 575, 598, 622, 645, 669, 692, 716, 740, 764, 788, 813, 837, 861, 886, 911, 935
OFFSET
1,1
LINKS
FORMULA
a(n) = A050502(4*n). - Michel Marcus, Jan 11 2016
MATHEMATICA
Table[Ceiling[4*n*Log[4*n]], {n, 80}] (* Vincenzo Librandi, Feb 13 2013 *)
PROG
(Derive) PROG(y := [], x := 100, LOOP(IF(x = 0, RETURN y), y := ADJOIN(CEILING(4·x·LOG(4·x)), y), x := x - 1))
(Magma) [Ceiling(4*n*Log(4*n)): n in [1..80]]; // Vincenzo Librandi, Feb 13 2013
(PARI) a(n) = ceil(4*n*log(4*n)); \\ Michel Marcus, Jan 11 2016
KEYWORD
easy,nonn
AUTHOR
Mohammad K. Azarian, May 31 2012
STATUS
approved