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A134401
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Row sums of triangle A134400.
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3
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1, 2, 8, 24, 64, 160, 384, 896, 2048, 4608, 10240, 22528, 49152, 106496, 229376, 491520, 1048576, 2228224, 4718592, 9961472, 20971520, 44040192, 92274688, 192937984, 402653184, 838860800, 1744830464, 3623878656, 7516192768
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Contribution from Johannes W. Meijer (meijgia(AT)hotmail.com), Aug 15 2010: (Start)
An elephant sequence, see A175654. For the corner squares four A[5] vectors, with decimal values 187, 190, 250 and 442, lead to this sequence. For the central square these vectors lead to the companion sequence 2*A001792, for n>=1 and a(0)=1.
(End)
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FORMULA
| Binomial transform of repeats of (4n+1): [1, 1, 5, 5, 9, 9, 13, 13,...].
a(n)=n*2^n, n>1 - Eugeny Yakimovitch (Eugeny.Yakimovitch(AT)gmail.com), Jan 08 2008
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EXAMPLE
| a(3) = 24 = sum of row 3 terms of triangle A134400: (3 + 9 + 9 + 3).
a(3) = 24 = (1, 3, 3, 1) dot (1, 1, 5, 5) = (1 + 3 + 15 + 5).
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MATHEMATICA
| F = Function[x, x*2^x]; F[Range[1, 10]] - Eugeny Yakimovitch (Eugeny.Yakimovitch(AT)gmail.com), Jan 08 2008
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CROSSREFS
| Essentially the same sequence as A036289. Cf. A134400.
Sequence in context: A006730 A131135 A097064 * A036289 A018045 A050242
Adjacent sequences: A134398 A134399 A134400 * A134402 A134403 A134404
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KEYWORD
| nonn
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AUTHOR
| Gary W. Adamson (qntmpkt(AT)yahoo.com), Oct 23 2007
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EXTENSIONS
| More terms from Johannes W. Meijer (meijgia(AT)hotmail.com), Aug 15 2010
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