A067072 - OEIS

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A067072

a(n) = smallest square m^2 such that the sum of the digits of m^2 is equal to n^2.

1, 4, 9, 169, 4489, 69696, 2778889, 277788889, 8998988769, 2699997789889 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	EXAMPLE	`a(4) = 4489 = 67^2 as it is the smallest square whose digit sum =16 =4^2.`
	CROSSREFS	`Cf. A061912.` `Sequence in context: A061271 A084009 A029738 * A080438 A029999 A006280` `Adjacent sequences: A067069 A067070 A067071 * A067073 A067074 A067075`
	KEYWORD	`nonn,base`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Jan 05 2002`
	EXTENSIONS	`More terms from Jason Earls (zevi_35711(AT)yahoo.com), Jan 09 2002`

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Last modified February 17 21:13 EST 2012. Contains 206085 sequences.