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A071954
a(n) = 4*a(n-1) - a(n-2) - 4, with a(0)=2, a(1)=4.
+0
5
2, 4, 10, 32, 114, 420, 1562, 5824, 21730, 81092, 302634, 1129440, 4215122, 15731044, 58709050, 219105152, 817711554, 3051741060, 11389252682, 42505269664, 158631825970, 592022034212, 2209456310874, 8245803209280
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.
AT&T Labs Research
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