id:A117746 - OEIS Search Results

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Numbers of the form n^2-n-1 for which the sum of the digits is also a number of the form n^2-n-1.

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1, 5, 29, 41, 131, 155, 209, 379, 461, 551, 649, 991, 1055, 1121, 1189, 1639, 1721, 1891, 2351, 2449, 2755, 3079, 3305, 3781, 4159, 4421, 4555, 5699, 5851, 6005, 6319, 6805, 7309, 7831, 8371, 9505, 10099, 10301, 10505, 12431, 12655, 13339, 14761 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`5699 is in the sequence because (1)5699=76^2-76-1, (2)the sum of its digits is 5+6+9+9=29 and (3)29 can be written as 6^2-6-1`
	CROSSREFS	`Sequence in context: A033205 A167742 A107151 this_sequence A156053 A081116 A146829` `Adjacent sequences: A117743 A117744 A117745 this_sequence A117747 A117748 A117749`
	KEYWORD	`base,nonn`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 14 2006`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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