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5, 77, 1044, 14784, 227877, 3862305, 71983440, 1469813400, 32718512925, 789901955325, 20578796752500, 575836554270600, 17232413940017325, 549370878062313825, 18591830334684129600, 665771181527890746000, 25154357611638416671125, 1000094581801108086418125, 41741166856778766269392500
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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2,1
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LINKS
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PROG
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(PARI)
my(x='x+O('x^N), y0=1+O('x^N), y1=0, n=1);
while(n++,
y1 = (1 + x*y0 + 2*x^2*y0')*(1 - x*y0*(1-t))/(1-x*y0)^2;
if (y1 == y0, break()); y0 = y1; );
y0;
};
Kol(K, N=20) = {
my(s = A286781_ser(N+K+1, 't+O('t^(K+1))),
p = (1 + x*s + 2*x^2*s')/(1-x*s)^2);
vector(N, n, polcoeff(polcoeff(p, K+n), K));
};
Kol(1)
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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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