**a(n+1) = 5*a(n) - 2*a(n-1)**

*5, 21, 95, 433, 1975, 9009, 41095, 187457, 855095, 3900561, 17792615, 81161953*

*3 seqfan posts*

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

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