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0, 1, 1, 2, 4, 13, 101, 5242, 13747054, 94490767454888, 4464252567107002358694986701, 9964775491460730298984873909049635615687553262572198767
(list;
graph;
refs;
listen;
history;
text;
internal format)
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OFFSET
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1,4
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LINKS
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PROG
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(PARI) t(n)=n*(n+1)/2 v=vector(12) v[2]=1 for (i=3, 12, v[i]=t(v[i-1])+t(v[i-2])) v
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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