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%I #13 Oct 19 2017 03:15:00
%S 40,256,312,472,688,904,1120,1200,1312,1336,1552,1768,1984,2187,2200,
%T 2312,2416,2456,2632,2848,2875,3064,3280,3312,3429,3496,3712,3928,
%U 3944,4144,4312,4360,4576,4792,5008,5224,5312,5440,5562,5656,5872,6088,6250,6304,6312,6345,6520,6655,6688,6736,6952
%N Non-cubefree numbers n such that 2n+1 is also non-cubefree (A046099).
%C The probability that a random integer is cubefree is 1/zeta(3) (see A088453).
%H R. J. Mathar, <a href="/A115170/b115170.txt">Table of n, a(n) for n = 1..700</a>
%e 312 is there because 2^3 divides 312 and 5^3 divides 312*2+1.
%Y Cf. A005384 (n and 2n+1 prime), A046099, A088453, A111153 (n and 2n+1 semiprime), A117204 (n and 2n+1 squarefree), A115228.
%K easy,nonn
%O 1,1
%A _Jonathan Vos Post_, Mar 03 2006
%E Edited by _Don Reble_, Mar 05 2006
%E 2875 inserted by _R. J. Mathar_, Dec 08 2015
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