id:A028503 - OEIS Search Results

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Numbers n such that n(n+2) is a palindrome.

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3

1, 2, 9, 17, 23, 64, 75, 99, 191, 204, 999, 1747, 1907, 2365, 2966, 5731, 9999, 18991, 20564, 99999, 174601, 174747, 179317, 243063, 293786, 552101, 999999, 1868287, 2967032, 9200156, 9999999, 22765895, 31552659, 93809716 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`P. De Geest, Palindromic quasipronic numbers of the form n(n+2)`
	CROSSREFS	`Cf. A005563, A028504.` `Adjacent sequences: A028500 A028501 A028502 this_sequence A028504 A028505 A028506` `Sequence in context: A062981 A069622 A137189 this_sequence A100291 A083419 A126082`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com)`

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Last modified November 3 12:59 EST 2009. Contains 165766 sequences.

AT&T Labs Research