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A002894
Binomial(2n,n)^2.
(Formerly M3664 N1490)
+0
24
1, 4, 36, 400, 4900, 63504, 853776, 11778624, 165636900, 2363904400, 34134779536, 497634306624, 7312459672336, 108172480360000, 1609341595560000, 24061445010950400, 361297635242552100
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
)
Last modified November 25 20:09 EST 2009. Contains 167514 sequences.
AT&T Labs Research
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