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%I #19 Jun 20 2016 19:36:20
%S 0,1,1,-1,-7,-15,-28,-43,-61,-80,-100,-119,-137,-151,-162,-167,-167,
%T -161,-147,-125,-95,-57,-11,44,107,177,255,339,429,524,623,725,830,
%U 935,1040,1143,1244,1342,1434,1520,1599,1669,1730,1780,1819,1845,1858,1857,1841,1810,1763,1700,1621,1525
%N a(n) = nearest integer to n^2 * cos(sqrt(n)).
%H N. J. A. Sloane and Chai Wah Wu, <a href="/A274090/b274090.txt">Table of n, a(n) for n = 0..10000</a> n = 0..1000 from N. J. A. Sloane.
%p Digits:=50: f:=n->round(evalf(n^2*cos(sqrt(n)))); [seq(f(n),n=0..120)];
%o (Python)
%o from sympy import cos, sqrt
%o def A274090(n):
%o return int((n**2*cos(sqrt(n))).round()) # _Chai Wah Wu_, Jun 11 2016
%Y Sequences of the same type: A272695, A274086, A274087, A274088, A274090, A274091, A274092, A274095, A274096, A274097, A274101, A274102.
%K sign
%O 0,5
%A _N. J. A. Sloane_, Jun 10 2016
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