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A053730
2^(n-2)*(n^2-n+4).
+0
2
1, 2, 6, 20, 64, 192, 544, 1472, 3840, 9728, 24064, 58368, 139264, 327680, 761856, 1753088, 3997696, 9043968, 20316160, 45350912, 100663296, 222298112, 488636416, 1069547520, 2332033024, 5066719232, 10972299264, 23689428992
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Maintained by
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Last modified December 19 12:50 EST 2009. Contains 171053 sequences.
AT&T Labs Research
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