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A026977
Sum{T(n,k)*T(n,k+1)}, 0<=k<=n-1, T given by
A026659
.
+0
1
1, 4, 24, 90, 365, 1376, 7365, 28002, 121049, 465004, 2437089, 9396986, 41758527, 162167568, 842470494, 3277804402, 14798196587, 57865149612, 299015494394
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
AT&T Labs Research
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