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A027120
T(n,2n-2), T given by
A027113
.
+0
1
2, 7, 20, 56, 155, 429, 1188, 3298, 9181, 25634, 71781, 201569, 567538, 1601971, 4532460, 12851882, 36516613, 103955432, 296471643, 846932919, 2423256440, 6943726380, 19924638557, 57247669927, 164688166948, 474323305547
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Maintained by
N. J. A. Sloane
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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.
AT&T Labs Research
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