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A001519 a(n) = 3a(n-1)-a(n-2), with a(0) = a(1) = 1.
(Formerly M1439 N0569)
+0
155
1, 1, 2, 5, 13, 34, 89, 233, 610, 1597, 4181, 10946, 28657, 75025, 196418, 514229, 1346269, 3524578, 9227465, 24157817, 63245986, 165580141, 433494437, 1134903170, 2971215073, 7778742049, 20365011074, 53316291173, 139583862445, 365435296162 (list; graph; listen)
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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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