A167035 - OEIS

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A167035

Squares that remain squares if prefixed with a 1.

225, 5625, 22500, 562500, 2250000, 5405625, 23765625, 56250000, 225000000, 540562500, 2127515625, 2376562500, 5625000000, 22500000000, 54056250000, 58503515625, 212751562500, 237656250000, 562500000000, 2250000000000, 5405625000000, 5850351562500 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	LINKS	`Chai Wah Wu, Table of n, a(n) for n = 1..1000`
	EXAMPLE	`225 = 15^2 is a square and becomes the square 1225 = 35^2 if a 1 is attached in front.`
	MAPLE	`P:=proc(i) local a, n; for n from 1 by 1 to i do a:=10^floor(1+log10(n^2))+n^2; if a=trunc(sqrt(a))^2 then print(n^2); fi; od; end: P(10000000000000); # Paolo P. Lava, Nov 02 2009`
	CROSSREFS	`Sequence in context: A218813 A330819 A297760 * A167042 A242268 A164763` `Adjacent sequences: A167032 A167033 A167034 * A167036 A167037 A167038`
	KEYWORD	`base,nonn`
	AUTHOR	`Claudio Meller, Oct 27 2009`
	EXTENSIONS	`Comment turned into example by R. J. Mathar, Oct 28 2009` `More terms from Chai Wah Wu, Sep 11 2014`
	STATUS	`approved`

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Last modified May 23 01:52 EDT 2022. Contains 353959 sequences. (Running on oeis4.)