A139768 - OEIS

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A139768

Numbers n such that (10^(n+1) mod 9^(n+1))/(10^n mod 9^n)=10, or A139739(n+1)/A139739(n)=10.

21, 38, 57, 58, 71, 81, 127, 148, 164, 181, 188, 195, 204, 208, 209, 212, 232, 244, 249, 250, 251, 252, 267, 269, 270, 300, 317, 326, 356, 357, 382, 398, 407, 409, 416, 417, 420, 447, 448, 453, 471, 479, 480, 481, 492, 502, 505, 528, 530, 548, 554, 561, 570 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`Also, this is the set of numbers n such that 9floor((10/9)^(n+1))==10floor((10/9)^n) (cf. A065566). For proof see Mathar link.`
	LINKS	`R. J. Mathar, Proof of alternative characterization.`
	CROSSREFS	`Cf. A139739, A065566.` `Sequence in context: A109211 A050782 A061906 * A176071 A072708 A102478` `Adjacent sequences: A139765 A139766 A139767 * A139769 A139770 A139771`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com) and N. J. A. Sloane (njas(AT)research.att.com), May 20 2008, May 24 2008`

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Last modified February 14 19:37 EST 2012. Contains 205663 sequences.