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A004996
6^n/n!*product[ k=0..n-1 ](6*k - 1).
+0
1
1, -6, -90, -1980, -50490, -1393524, -40412196, -1212365880, -37280250810, -1168114525380, -37146041907084, -1195427166827976, -38851382921909220, -1273129932671794440, -42013287778169216520
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.
AT&T Labs Research
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