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%I #4 Mar 30 2012 18:50:26
%S 10,15,21,511,767,213,69,319,95,117,511,597,165,175,767,213,959,245,
%T 4351,287,1173,319,335,357,1557,405,415,1727,437,453,511,527,549,559,
%U 597,2431,629,655,671,693,46079,725,767,3093,789,799,847,895,3647,917
%N First nonprime reached when starting with the n-th prime p and iterating the map k -> 4*k+(p mod 4), or -1 if no integer is ever reached.
%Y Cf. A075520, A075522, A075524.
%K nonn
%O 1,1
%A _Reinhard Zumkeller_, Sep 19 2002
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