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A032101
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Number of dyslexic identity planted planar trees with n+1 nodes.
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2
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1, 1, 1, 2, 4, 11, 28, 78, 212, 598, 1686, 4841, 13975, 40777, 119698, 353905, 1051948, 3143582, 9436033, 28443340, 86055366, 261253380, 795587214, 2429692385, 7439569568, 22834518491, 70243063795, 216527666056
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OFFSET
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1,4
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LINKS
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FORMULA
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Shifts left under "BHK" (reversible, identity, unlabeled) transform
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PROG
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(PARI)
BHK(p)={p + (1/(1-p) - (1+p)/subst(1-p, x, x^2))/2}
seq(n)={my(p=O(1)); for(i=1, n, p=1+BHK(x*p)); Vec(p)} \\ Andrew Howroyd, Aug 30 2018
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CROSSREFS
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KEYWORD
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nonn,eigen
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AUTHOR
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STATUS
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approved
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