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A110578
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{a(2,n)}, where a(m,n) is as defined in sequence A110576.
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5
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1, 3, 7, 18, 58, 230, 1050, 5277, 28613, 165895, 1023073, 6682569, 46054782, 333712277, 2534298321, 20114189445, 166423322294, 1432251611705, 12795182247109, 118443504257081, 1134237257303476, 11219647646806519
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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a[0, 0] := 1; a[0, 1] := 1; a[0, n_] := a[0, n] = Sum[Binomial[2*n - k - 3, n - 2]*a[0, k], {k, 0, n - 1}]; a[1, 0] := 1; a[1, n_] := a[1, n] = a[1, n - 1] + a[0, n]; a[2, 0] := 1; a[2, n_] := a[2, n] = a[2, n - 1] + a[1, n]; Table[a[2, n], {n, 0, 50}] (* G. C. Greubel, Sep 01 2017 *)
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CROSSREFS
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KEYWORD
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easy,nonn
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AUTHOR
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EXTENSIONS
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STATUS
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approved
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