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A055476
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Powers of ten written in base 5.
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2
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1, 20, 400, 13000, 310000, 11200000, 224000000, 10030000000, 201100000000, 4022000000000, 130440000000000, 3114300000000000, 112341000000000000, 2302320000000000000, 101101400000000000000, 2022033000000000000000
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| The leading numbers free of the trailing end 0's in the entries of sequence a(n) are the corresponding powers of 2 written in base 5, i.e., A000866(n). [From Lekraj Beedassy (blekraj(AT)yahoo.com), Oct 26 2010]
The first formula follows from the fact that the quinary representation of 10^n - 1 is equal to the concatenation of the quinary representation of 2^n - 1 with four times the n-th repunit; so the sucessor 10^n is the concatenation of 2^n with n zeros. See the Regan link. [From W. Bomfim webonfim(AT)bol.com Dec 24, 2010]
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LINKS
| Rick Regan, Nines in quinary
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FORMULA
| a(n) = A000866(n) followed by n zeros.
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CROSSREFS
| Cf. A000468, A011557.
Sequence in context: A048987 A006494 A007545 * A041181 A041762 A196740
Adjacent sequences: A055473 A055474 A055475 * A055477 A055478 A055479
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KEYWORD
| base,easy,nonn
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AUTHOR
| Henry Bottomley (se16(AT)btinternet.com), Jun 27 2000
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EXTENSIONS
| More terms from James A. Sellers (sellersj(AT)math.psu.edu), Jul 04 2000
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