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A135920
O.g.f.: A(x) = Sum_{n>=0} x^n / Product_{k=0..n} (1 - k^2*x).
+0
2
1, 1, 2, 7, 37, 264, 2433, 27913, 386906, 6346119, 121159373, 2655174768, 66028903633, 1845579100993, 57506847262162, 1983312152411351, 75238783332550789, 3122408658986242072, 141063757638078429489
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Maintained by
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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.
AT&T Labs Research
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