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A004253
a(n) = 5a(n-1) - a(n-2).
(Formerly M3553)
+0
17
1, 4, 19, 91, 436, 2089, 10009, 47956, 229771, 1100899, 5274724, 25272721, 121088881, 580171684, 2779769539, 13318676011, 63813610516, 305749376569, 1464933272329, 7018916985076, 33629651653051, 161129341280179
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified November 24 23:16 EST 2009. Contains 167481 sequences.
AT&T Labs Research
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