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A027979
a(n) = Sum{T(n,k)*T(n,2n-k)}, 0<=k<=n, T given by
A027960
.
+0
1
1, 10, 29, 97, 297, 904, 2685, 7876, 22823, 65533, 186691, 528370, 1486969, 4164382, 11613137, 32264089, 89339325, 246645436, 679111413, 1865340568, 5112351131, 13983383605, 38177371159, 104055773542, 283171508977
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 17 23:40 EST 2009. Contains 171025 sequences.
AT&T Labs Research
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