%I
%S 2,3,4,5,6,7,8,9,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,30,
%T 31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,
%U 56,57,58,59,60,61,62,63,64,65,66,67,68,69,70,71,72,73,74,75,76,77,78,79
%N Numbers k such that k! is not divisible by the square of (f+1)!, where f = floor(k/2).
%C Values of f are in A001057 or A004526.
%e 12 is here because 12!/(7!*7!) = 132/7 is not an integer. 10 is not here because 10!/(6!*6!) = 7 is an integer.
%Y Cf. A001057, A004526.
%K nonn
%O 1,1
%A _Labos Elemer_, Jul 27 2000
