**Pisot sequence E(4,13): a(n)=[ a(n-1)^2/a(n-2)+1/2 ].**

*4, 13, 42, 136, 440, 1424, 4609, 14918, 48285, 156284, 505844, 1637264, 5299328*

*2 seqfan posts*

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

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