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A206463
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G.f. satisfies: A(x*D(-x)) = x where D(x) = g.f. of A014577, the dragon curve sequence.
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0
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1, 1, 2, 6, 19, 63, 220, 796, 2951, 11155, 42846, 166738, 655990, 2604868, 10426448, 42023678, 170407186, 694723354, 2845839124, 11707587484, 48350311989, 200377116719, 833062172188, 3473507707930, 14521668486233, 60859782366097, 255639891601242
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OFFSET
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1,3
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LINKS
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EXAMPLE
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G.f.: A(x) = x + x^2 + 2*x^3 + 6*x^4 + 19*x^5 + 63*x^6 + 220*x^7 + 796*x^8 +...
such that A(x*D(-x)) = x and D(x) is the g.f. of the dragon curve:
D(x) = 1 + x + x^3 + x^4 + x^7 + x^8 + x^9 + x^12 + x^15 + x^16 + x^17 + x^19 + ...
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PROG
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{a(n)=local(DC=vector(n+1, k, (-1)^(k-1)*A014577(k-1))); polcoeff(serreverse(x*Ser(DC)), n)}
for(n=0, 61, print1(a(n), ", "))
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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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