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Search: id:A130206
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A130206 a(1) = 1, a(2) = 2; for n>2, a(n) = t(n)-a(n-1)-a(n-2), where t(n) = n(n+1)/2 = triangular number A000217. +0
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Last modified December 11 12:57 EST 2009. Contains 170656 sequences.


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