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A245245
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a(n) = C(3*n^2, n^2).
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3
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1, 3, 495, 4686825, 2254848913647, 52588547141148893628, 58152371703925106867047535565, 3012179439602547459232394950891834843500, 7255167425905233148164780983569428433097979870294255, 808718755397067598640202627155266231883064669446721506930287016061
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OFFSET
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0,2
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COMMENTS
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LINKS
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FORMULA
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Logarithmic derivative of A213409 (ignoring initial term a(0) of this sequence).
a(n) ~ 3^(3*n^2+1/2) / (sqrt(Pi) * n * 2^(2*n^2+1)). - Vaclav Kotesovec, Jul 15 2014
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MATHEMATICA
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PROG
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(PARI) {a(n)=binomial(3*n^2, n^2)}
for(n=0, 15, 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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