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A201863
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Let CZ(0,x)=1, CZ(1,x)=0 , CZ(2,x)=x^2-1 and CZ(n,x)=2*x*CZ(n-1,x) - CZ(n-2,x) for n > 2. This sequence is the triangle of polynomial coefficients in order of decreasing exponents.
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2
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1, 0, 0, 1, 0, -1, 2, 0, -2, 0, 4, 0, -5, 0, 1, 8, 0, -12, 0, 4, 0, 16, 0, -28, 0, 13, 0, -1, 32, 0, -64, 0, 38, 0, -6, 0, 64, 0, -144, 0, 104, 0, -25, 0, 1, 128, 0, -320, 0, 272, 0, -88, 0, 8, 0, 256, 0, -704, 0, 688, 0, -280, 0, 41, 0, -1
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OFFSET
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0,7
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COMMENTS
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1, 1,
2, 2,
4, 5, 1,
8, 12, 4.
Hence a(n) first coefficients:
1,
0, 0
1, 0,- 1, x^2-1,
2, 0, -2, 0,
4, 0, -5, 0, 1
8, 0,-12, 0, 4, 0.
The first 1 is a choice.
Row sums=0.
Absolute value row sums: 1 before A163271.
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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