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A121365
a(n)=6*a(n-1)-9*a(n-2)+n+1.
+0
1
1, 1, 1, 2, 9, 43, 185, 732, 2737, 9845, 34449, 118102, 398585, 1328607, 4384393, 14348912, 46633953, 150663529, 484275617, 1549681962, 4939611241, 15690529811, 49686677721, 156905298052, 494251688849
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Maintained by
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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.
AT&T Labs Research
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