**a(1)=1. a(n) = the smallest positive integer such that both a(n) and sum{k=1 to n} a(k) have the same number of (nonleading) 0's when they are represented in binary.**

*1, 5, 1, 6, 9, 4, 18, 8, 36, 16, 72, 32, 144, 64, 288, 128, 576, 256, 1152, 512, 2304*

*1 seqfan posts*

Index of A-numbers in seqfan: by ascending order by month by frequency by keyword

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