id:A117799 - OEIS Search Results

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Icosagonal numbers for which the sum of the digits is also an icosagonal number.

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0, 1, 7337, 12692, 19505, 37505, 61337, 75440, 146432, 240752, 326592, 358400, 620417, 708401, 802217, 851312, 1007345, 1062272, 1176500, 1235801, 1422452, 1622225, 1835120, 1909001, 2061137, 2219105, 2300276, 2728001, 4010672 (list; graph; listen)

	OFFSET	`1,3`
	EXAMPLE	`7337 is in the sequence because (1) it is an icosagonal number and (2) the sum of the digits 7+3+3+7=20 is also an icosagonal number.`
	CROSSREFS	`Cf. A051872.` `Sequence in context: A031799 A116248 A140078 this_sequence A097696 A128478 A043589` `Adjacent sequences: A117796 A117797 A117798 this_sequence A117800 A117801 A117802`
	KEYWORD	`nonn,base`
	AUTHOR	`Luc Stevens (lms022(AT)yahoo.com), Apr 29 2006`

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

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