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A038121
E.g.f.: (1+15*x+45/2*x^2+5/2*x^3)/(1-2*x)^(13/2).
+0
3
1, 28, 630, 13860, 315315, 7567560, 192972780, 5237832600, 151242416325, 4638100767300, 150738274937250, 5179915266025500, 187771928393424375, 7164221267933730000, 287080580807915895000, 12057384393932467590000
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Maintained by
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Last modified December 4 12:44 EST 2009. Contains 170310 sequences.
AT&T Labs Research
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