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A128063
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Hankel transform of A115962.
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0
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1, 2, 0, -8, -16, -32, -64, 0, 256, 512, 1024, 2048, 0, -8192, -16384, -32768, -65536, 0, 262144, 524288, 1048576, 2097152, 0, -8388608, -16777216, -33554432, -67108864, 0, 268435456, 536870912, 1073741824, 2147483648, 0, -8589934592, -17179869184
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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FORMULA
| a(n)=2^n*((1/2-3sqrt(5)/10)cos(3*pi*n/5)+sqrt(1/10-sqrt(5)/50)sin(3*pi*n/5) +(3sqrt(5)/10+1/2)cos(pi*n/5)-sqrt(sqrt(5)/50+1/10)sin(pi*n/5)); a(n)=2^n*sum(k=0..,floor((n+2)/2), C(n-k+2,k)(-1)^k*F(n-2k+3)}; a(n)=2^n*A099443(n+2);
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CROSSREFS
| Sequence in context: A186033 A120559 A120555 * A171552 A087205 A062134
Adjacent sequences: A128060 A128061 A128062 * A128064 A128065 A128066
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KEYWORD
| easy,sign
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AUTHOR
| Paul Barry (pbarry(AT)wit.ie), Feb 13 2007
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