%I #15 May 31 2024 05:48:32
%S 4,13,22,31,36,41,50,59,68,77,86,95,104,109,114,123,132,141,150,159,
%T 168,177,182,187,196,205,214,223,232,241,250,255,260,269,278,287,292,
%U 297,306,315,324,329,334,343,352,361,370,379,388,397,402,407,416,425
%N a(n) is the position of the n-th occurrence of the pair "2,2" in A067395 (the first difference sequence of A067368).
%C A comparison of this sequence with A067368 suggests the following conjecture: a(n)=2*A067368(n)+n-1. This has been confirmed for several hundred terms.
%C Above conjecture is true, and it is same as conjecture in Formula section of A067368. - _Altug Alkan_, Sep 26 2018
%C The asymptotic density of this sequence is 1/8. - _Amiram Eldar_, May 31 2024
%H Altug Alkan, <a href="/A067396/b067396.txt">Table of n, a(n) for n = 1..1000</a>
%e A067395 begins {4,4,4,2,2,4,4,4,4,...}, so a(1)=4.
%Y Cf. A067368, A067395, A213258.
%K nonn
%O 1,1
%A _John W. Layman_, Jan 22 2002
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