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Search: id:A099495
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| A099495 |
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A Chebyshev transform of Fib(n)^2. |
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+0
2
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| 0, 1, 1, 2, 6, 12, 25, 55, 118, 254, 548, 1179, 2539, 5470, 11780, 25370, 54641, 117681, 253452, 545866, 1175642, 2532005, 5453235, 11744748, 25294914, 54478198, 117330859, 252697979, 544241040, 1172143560, 2524470640, 5437006381
(list; graph; listen)
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OFFSET
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0,4
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COMMENT
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A Chebyshev transform of A007598, which has g.f. x(1-x)/((1+x)(1-3x+x^2)). The image of G(x) under the Chebyshev transform is (1/(1+x^2))G(x/(1+x^2)).
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FORMULA
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G.f.: x(1-x+x^2)/((1+x+x^2)(1-3x+3x^2-3x^3+x^4)); a(n)=2a(n-1)-a(n-2)+3a(n-3)-a(n-4)+2a(n-5)-a(n-6); a(n)=sum{k=0..floor(n/2), binomial(n-k, k)(-1)^k*F(n-2k)^2}.
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CROSSREFS
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Adjacent sequences: A099492 A099493 A099494 this_sequence A099496 A099497 A099498
Sequence in context: A045925 A128020 A116562 this_sequence A034875 A136515 A054454
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Oct 19 2004
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