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A025579
a(1)=1, a(2)=2, a(n) = 4*3^(n-3) for n >= 3.
+0
3
1, 2, 4, 12, 36, 108, 324, 972, 2916, 8748, 26244, 78732, 236196, 708588, 2125764, 6377292, 19131876, 57395628, 172186884, 516560652, 1549681956, 4649045868, 13947137604, 41841412812, 125524238436, 376572715308, 1129718145924
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Maintained by
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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.
AT&T Labs Research
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