id:A147589 - OEIS Search Results

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Concatenation of 2n-1 digits 1 and n-1 digits 0.

+0
2

1, 1110, 1111100, 1111111000, 1111111110000, 1111111111100000, 1111111111111000000, 1111111111111110000000, 1111111111111111100000000, 1111111111111111111000000000, 1111111111111111111110000000000 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n) is also A147590(n) written in base 2.`
	FORMULA	`a(n) = A138118(n)/10.` `a(n)={[10^(2n-1)-1]10^(n-1)}/9, with n>=1 [From Paolo P. Lava (ppl(AT)spl.at), Nov 26 2008]`
	EXAMPLE	`n .......... a(n)` `1 ........... 1` `2 ......... 1110` `3 ....... 1111100` `4 ..... 1111111000` `5 ... 1111111110000`
	CROSSREFS	`Cf. A138118, A147537, A147590.` `Sequence in context: A066163 A036105 A036103 this_sequence A086887 A100846 A072434` `Adjacent sequences: A147586 A147587 A147588 this_sequence A147590 A147591 A147592`
	KEYWORD	`easy,nonn`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Nov 08 2008`

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Last modified December 1 19:22 EST 2009. Contains 167811 sequences.

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