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A026625
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Sum{T(n-k,k)}, 0<=k<=[ n/2 ], T given by A026615.
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0
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1, 1, 2, 4, 7, 13, 21, 36, 58, 96, 155, 253, 409, 664, 1074, 1740, 2815, 4557, 7373, 11932, 19306, 31240, 50547, 81789, 132337, 214128, 346466, 560596, 907063, 1467661, 2374725, 3842388, 6217114, 10059504, 16276619, 26336125
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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FORMULA
| For n>1, a(n) = Fibonacci(n-1) + Lucas(n) - [3+(-1)^n]/2. - R. Stephan, May 13 2004
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MATHEMATICA
| Join[{1, 1}, Table[Fibonacci[n-1]+LucasL[n]-(3+(-1)^n)/2, {n, 2, 40}]] (* or *) Join[{1, 1}, LinearRecurrence[{1, 2, -1, -1}, {2, 4, 7, 13}, 40]] (* From Harvey P. Dale, Sep 27 2011 *)
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CROSSREFS
| Sequence in context: A205183 A090752 A051058 * A026691 A018150 A019471
Adjacent sequences: A026622 A026623 A026624 * A026626 A026627 A026628
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KEYWORD
| nonn
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AUTHOR
| Clark Kimberling (ck6(AT)evansville.edu)
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