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A032103
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Number of dyslexic identity planted planar trees with n+1 nodes and leaves of 2 colors.
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1
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2, 2, 3, 9, 32, 125, 489, 1971, 8057, 33582, 141854, 606967, 2623678, 11444588, 50306835, 222638649, 991173730, 4435974275, 19946529375, 90069370028, 408261634445, 1856940442884, 8472695323318
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OFFSET
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1,1
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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=2+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
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AUTHOR
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STATUS
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approved
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