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A211208
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Sums of squares of terms in rows of Losanitsch's triangle (A034851).
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2
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1, 2, 3, 10, 26, 92, 282, 1044, 3558, 13436, 48578, 185516, 693332, 2667160, 10156772, 39277160, 151224134, 587138284, 2275980402, 8864583324, 34516282476, 134779569352, 526441907852, 2060002196632, 8065098605532, 31615272898392, 124004228696052
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = Sum_{k=0..n} A034851(n,k)^2.
Limit_{n->oo} a(n+1)/a(n) = 4.
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PROG
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(PARI) {a(n)=sum(k=0, n, (binomial(n, k) + binomial(n%2, k%2) * binomial(n\2, k\2))^2/4)}
for(n=0, 30, print1(a(n), ", "))
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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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