A074841 - OEIS

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A074841

Square root of n contains n as a string of digits to the immediate right of the decimal point (excluding leading zeros).

8, 77, 5711, 9797, 77327, 997997, 8053139, 60755907, 62996069, 99979997 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,1`
	COMMENTS	`All numbers of the form (10^n-3)*(10^n+1), n>0, are members. - Robert G. Wilson v Aug 02 2004.`
	EXAMPLE	`The square root of 77327 = 278.077327...`
	MATHEMATICA	`f[n_] := Block[{l = Floor[ Log[10, n] + 1], rd = RealDigits[ Sqrt[n], 10, 24], id = IntegerDigits[n]}, rdd = Drop[ rd[[1]], rd[[2]]]; While[ rdd[[1]] == 0, rdd = Drop[rdd, 1]]; Take[rdd, l] == id]; Do[ If[ StringPosition[ ToString[ N[ Sqrt[n], 24]], ToString[n]] != {}, If[ f[n], Print[n]]], {n, 2, 6 10^8}] (from Robert G. Wilson v Aug 02 2004)`
	CROSSREFS	`Cf. A074762.` `Sequence in context: A187638 A092661 A196071 * A136954 A202732 A155600` `Adjacent sequences: A074838 A074839 A074840 * A074842 A074843 A074844`
	KEYWORD	`nonn,base`
	AUTHOR	`Paul Lusch (plusch(AT)flash.net), Sep 09 2002`
	EXTENSIONS	`More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 02 2004`

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Last modified February 14 06:58 EST 2012. Contains 205577 sequences.