id:A057136 - OEIS Search Results

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Palindromes whose square root is a palindrome.

+0
4

0, 1, 4, 9, 121, 484, 10201, 12321, 14641, 40804, 44944, 1002001, 1234321, 4008004, 100020001, 102030201, 104060401, 121242121, 123454321, 125686521, 400080004, 404090404, 10000200001, 10221412201, 12102420121, 12345654321, 40000800004 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Always contain an odd number of digits.`
	FORMULA	`a(n) = A057135(n)^2`
	EXAMPLE	`a(8) = 14641 since 14641 = 121^2 and 121 is also a palindrome`
	CROSSREFS	`Sequence in context: A131760 A002779 A028817 this_sequence A048411 A065379 A063783` `Adjacent sequences: A057133 A057134 A057135 this_sequence A057137 A057138 A057139`
	KEYWORD	`base,nonn`
	AUTHOR	`Henry Bottomley (se16(AT)btinternet.com), Aug 12 2000`

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Last modified December 18 21:37 EST 2009. Contains 171024 sequences.

AT&T Labs Research