%I #19 Jan 19 2024 20:02:04

%S 9,24,41,60,81,103,125,148,172,196,221,246,272,298,324,351,378,405,

%T 433,461,489,518,546,575,604,633,663,692,722,752,782,813,843,874,904,

%U 935,966,997,1029,1060,1092,1123,1155

%N a(n) = ceiling(5n*log(5n)).

%H Vincenzo Librandi, <a href="/A212462/b212462.txt">Table of n, a(n) for n = 1..1000</a>

%F a(n) = A050502(5*n). - _Michel Marcus_, Jan 11 2016

%t Table[Ceiling[5*n*Log[5*n]], {n, 80}] (* _Vincenzo Librandi_, Feb 14 2013 *)

%o (Derive) PROG(y := [], x := 100, LOOP(IF(x = 0, RETURN y), y := ADJOIN(CEILING(5·x·LOG(5·x)), y), x := x - 1))

%o (Magma) [Ceiling(5*n*Log(5*n)): n in [1..80]]; // _Vincenzo Librandi_, Feb 14 2013

%o (PARI) a(n) = ceil(5*n*log(5*n)); \\ _Michel Marcus_, Jan 11 2016

%Y Cf. A050502, A050504, A212455, A212456, A212457, A212458, A212459, A212460, A212461.

%K easy,nonn

%O 1,1

%A _Mohammad K. Azarian_, May 31 2012