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%I #3 Mar 30 2012 18:36:39
%S 1,3,6,8,11,13,16,19,21,24,26,29,32,34,37,40,42,45,47,50,53,55,58,60,
%T 63,66,68,71,73,76,79,81,84,86,89,92,94,97,99,102,105,107,110,112,115,
%U 118,120,123,126,128,131,133,136,139,141,144,146,149,152,154,157,159,162
%N Positions of the terms of A090847^4 in A090847, where A090847 is equal to the union of the self-convolutions A090847^2 and A090847^4 when ordered by size.
%C Given A090847(m)=A090847^4(n), then what is the limit m/n as n grows? Example: at n=2000, m/n=3202/2000=2.616, at n=3000, m/n=7849/3000=2.6163...
%e a(4)=11 since A090847^4(4)=A090847(11)=117, where
%e A090847={1,1,2,4,5,12,14,22,44,50,88,117,...} and
%e A090847^4={1,4,14,44,117,308,740,1700,3822,...}.
%Y Cf. A090845, A090847.
%K nonn
%O 0,2
%A _Paul D. Hanna_, Dec 09 2003