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A139142
This sequence and
A139143
are complements. a(1)=1.
A139143
(1)=2. a(n+1) = a(n) + sum{k=1 to n}
A139143
(k).
+0
2
1, 3, 9, 20, 37, 61, 93, 135, 188, 253, 331
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Maintained by
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Last modified November 27 14:34 EST 2009. Contains 167570 sequences.
AT&T Labs Research
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