1,2
a(n)=A025586[ -1+2^n]
Cf. A025586.
Sequence in context: A009935 A009931 A009936 this_sequence A087973 A117273 A137515
Adjacent sequences: A087698 A087699 A087700 this_sequence A087702 A087703 A087704
nonn
Labos E. (labos(AT)ana.sote.hu), Sep 24 2003
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