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A045501
Third-from-right diagonal of triangle
A121207
.
+0
5
1, 1, 4, 14, 54, 233, 1101, 5625, 30846, 180474, 1120666, 7352471, 50772653, 367819093, 2787354668, 22039186530, 181408823710, 1551307538185, 13756835638385, 126298933271289, 1198630386463990, 11742905240821910
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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 21 10:15 EST 2009. Contains 171081 sequences.
AT&T Labs Research
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