id:A068178 - OEIS Search Results

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a(1) = 4; for n>1, a(n) is the smallest square > a(n-1) obtained by inserting digits into a(n-1).

+0
4

4, 49, 1849, 18496, 1784896, 177848896, 17778488896, 1777784888896, 177777848888896, 17777778488888896, 1777777784888888896, 177777777848888888896, 17777777778488888888896 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(2)=49 hence a(3) = 1849 the smallest square formed from 49.`
	CROSSREFS	`Cf. A068175, A068176, A068177, A091877 gives square roots.` `Sequence in context: A065738 A067717 A067714 this_sequence A050630 A080808 A087588` `Adjacent sequences: A068175 A068176 A068177 this_sequence A068179 A068180 A068181`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 25 2002`
	EXTENSIONS	`Corrected and extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 11 2003`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research