A035122 - OEIS

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A035122

Roots of 'squares remaining square when written backwards'.

1, 2, 3, 11, 12, 13, 21, 22, 26, 31, 33, 99, 101, 102, 103, 111, 112, 113, 121, 122, 201, 202, 211, 212, 221, 264, 301, 307, 311, 836, 1001, 1002, 1003, 1011, 1012, 1013, 1021, 1022, 1031, 1101, 1102, 1103, 1111, 1112, 1113, 1121, 1122, 1201, 1202, 1211 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	COMMENTS	`Numbers with trailing zeros are excluded.`
	LINKS	`Eric Weisstein's World of Mathematics, Square Number` `Index entry for sequences related to reversing digits of squares`
	EXAMPLE	`E.g. 99^2 = 9801 -> 1089 = 33^2.`
	MATHEMATICA	`Select[Range[10000], IntegerQ[Sqrt[FromDigits[Reverse[IntegerDigits[ #^2]]]]] &] (and then delete terms ending with 0). - N. J. A. Sloane, Jul 08 2011`
	CROSSREFS	`Cf. A033294, A035125.` `Sequence in context: A127494 A130803 A007932 * A085305 A189818 A116032` `Adjacent sequences: A035119 A035120 A035121 * A035123 A035124 A035125`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Nov 15 1998.`

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Last modified February 15 18:22 EST 2012. Contains 205835 sequences.