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A081555
a(n)=6a(n-1)-a(n-2)-4, a(0)=3, a(1)=7.
+0
2
3, 7, 35, 199, 1155, 6727, 39203, 228487, 1331715, 7761799, 45239075, 263672647, 1536796803, 8957108167, 52205852195, 304278004999, 1773462177795, 10336495061767, 60245508192803, 351136554095047, 2046573816377475
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Maintained by
N. J. A. Sloane
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Last modified December 10 00:48 EST 2009. Contains 170565 sequences.
AT&T Labs Research
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