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A025183
a(n) = T(2n-1,n), where T is the array defined in
A025177
.
+0
1
1, 4, 20, 111, 616, 3465, 19668, 112476, 647088, 3741156, 21718520, 126520240, 739225704, 4330188265, 25421864580, 149541718275, 881200519200, 5200715525016, 30736780735752, 181886951796886
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified November 27 14:50 EST 2009. Contains 167570 sequences.
AT&T Labs Research
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