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A051920
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C(n, [n/2]) + 1.
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5
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2, 2, 3, 4, 7, 11, 21, 36, 71, 127, 253, 463, 925, 1717, 3433, 6436, 12871, 24311, 48621, 92379, 184757, 352717, 705433, 1352079, 2704157, 5200301, 10400601, 20058301, 40116601, 77558761, 155117521, 300540196, 601080391, 1166803111
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,1
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COMMENTS
| With the exception of the initial 2s, these are numbers such that if Pascal's triangle is written in base a(n) - 1, the first n - 2 rows give the digits of the powers of a(n) written in that base. This is most often noticed for the powers of 11 since of course we use decimal. - From Alonso del Arte, Jul 10 2011
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CROSSREFS
| Cf. A001405, A006481.
Sequence in context: A110871 A173433 A053638 * A023105 A011784 A032252
Adjacent sequences: A051917 A051918 A051919 * A051921 A051922 A051923
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Dec 18 1999
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