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A112000
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One half of third column (k=2) of triangle A111999.
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1
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-3, 65, -1190, 22050, -433125, 9144135, -208107900, 5099994900, -134219460375, 3781060408125, -113633468798850, 3631422078033750, -123022987568105625, 4405418319999571875, -166312279434175875000, 6602853358582065585000, -275059081486584416896875
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internal format)
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OFFSET
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0,1
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LINKS
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FORMULA
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Conjecture: +n*(4*n+5)*a(n) +(2*n+3)*(n+2)*(4*n+9)*a(n-1)=0. - R. J. Mathar, Jul 09 2017
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CROSSREFS
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Cf. Second (k=1) column: A000906(n+2)*(-1)^n = 2*A000457(n+2)*(-1)^n, n>=0.
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KEYWORD
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sign,easy
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AUTHOR
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STATUS
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approved
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