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A072256
a(n) = 10*a(n-1) - a(n-2); a(0) = a(1) = 1.
+0
18
1, 1, 9, 89, 881, 8721, 86329, 854569, 8459361, 83739041, 828931049, 8205571449, 81226783441, 804062262961, 7959395846169, 78789896198729, 779939566141121, 7720605765212481, 76426118085983689, 756540575094624409
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Maintained by
N. J. A. Sloane
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njas@research.att.com
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Last modified December 17 19:39 EST 2009. Contains 170821 sequences.
AT&T Labs Research
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