A197903 - OEIS

%I #12 Sep 08 2022 08:45:59

%S 16,40,124,327,732,1447,2604,4359,6892,10407,15132,21319,29244,39207,

%T 51532,66567,84684,106279,131772,161607,196252,236199,281964,334087,

%U 393132,459687,534364,617799,710652,813607,927372,1052679,1190284,1340967,1505532,1684807

%N Ceiling((n+1/n)^4).

%H Vincenzo Librandi, <a href="/A197903/b197903.txt">Table of n, a(n) for n = 1..10000</a>

%F a(n) = n^4 +4*n^2 +7, n>=3.

%F G.f.: (x^6-x^5-17*x^4+53*x^3-84*x^2+40*x-16)/(x-1)^5. - _Harvey P. Dale_, Apr 09 2015

%t Table[Ceiling[(n+1/n)^4],{n,40}] (* _Harvey P. Dale_, Apr 09 2015 *)

%o (Magma) [Ceiling((n+1/n)^4): n in [1..50]]

%Y Cf. A014058

%K nonn

%O 1,1

%A _Vincenzo Librandi_, Oct 19 2011