id:A028553 - OEIS Search Results

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Numbers n such that n(n+3) is a palindrome.

+0
3

0, 1, 8, 28, 66, 88, 211, 298, 671, 2126, 2998, 28814, 29369, 29998, 63701, 212206, 212671, 299998, 636776, 2122206, 2861419, 2999998, 9443423, 21341691, 28862883, 29999998, 212325206, 289053683, 294127328, 294174669, 299999998 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`Also: sum of the first n even composites is palindromic. Sequence is 4 + 6 + 8 + 10 + 12 + 14 + ... + z. For values of z see A058851. (Comment added by author 12/2000).`
	LINKS	`P. De Geest, Palindromic Quasipronics` `P. De Geest, Palindromic Sums 2`
	CROSSREFS	`Cf. A058851, A028554.` `Sequence in context: A007259 A134747 A083013 this_sequence A100182 A119515 A153976` `Adjacent sequences: A028550 A028551 A028552 this_sequence A028554 A028555 A028556`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com)`

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.

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