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A055846
A second order recursive sequence.
+0
1
1, 4, 25, 150, 900, 5400, 32400, 194400, 1166400, 6998400, 41990400, 251942400, 1511654400, 9069926400, 54419558400, 326517350400, 1959104102400, 11754624614400, 70527747686400, 423166486118400, 2538998916710400
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Maintained by
N. J. A. Sloane
(
njas@research.att.com
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Last modified December 3 22:15 EST 2009. Contains 170310 sequences.
AT&T Labs Research
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