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A047653
Constant term in expansion of (1/2) * Prod_{k=-n..n} 1+x^k.
+0
7
1, 2, 4, 10, 26, 76, 236, 760, 2522, 8556, 29504, 103130, 364548, 1300820, 4679472, 16952162, 61790442, 226451036, 833918840, 3084255128, 11451630044, 42669225172, 159497648600, 597950875256, 2247724108772, 8470205600640
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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 19 21:04 EST 2009. Contains 171054 sequences.
AT&T Labs Research
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