id:A023711 - OEIS Search Results

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Numbers with exactly 2 1's in base 4 expansion.

+0
2

5, 17, 20, 22, 23, 25, 29, 37, 53, 65, 68, 70, 71, 73, 77, 80, 82, 83, 88, 90, 91, 92, 94, 95, 97, 100, 102, 103, 105, 109, 113, 116, 118, 119, 121, 125, 133, 145, 148, 150, 151, 153, 157, 165, 181, 197, 209, 212, 214, 215, 217 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[ Range[ 240 ], (Count[ IntegerDigits[ #, 4 ], 1 ]==2)& ]`
	CROSSREFS	`Sequence in context: A019401 A098333 A043338 this_sequence A045119 A045095 A061940` `Adjacent sequences: A023708 A023709 A023710 this_sequence A023712 A023713 A023714`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`Olivier Gerard (ogerard(AT)ext.jussieu.fr)`

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Last modified July 25 02:12 EDT 2008. Contains 142294 sequences.

AT&T Labs Research