**a(n) is the minimal number of additions needed to grow to radius n, in the two-dimensional abelian sandpile growth model with h=2.**

*2, 6, 10, 22, 26, 50, 66, 78, 122, 142, 154, 194, 254, 270, 342, 386, 418, 490, 518*

*2 seqfan posts*

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

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