id:A023712 - OEIS Search Results

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Numbers with exactly 3 1's in base 4 expansion.

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21, 69, 81, 84, 86, 87, 89, 93, 101, 117, 149, 213, 261, 273, 276, 278, 279, 281, 285, 293, 309, 321, 324, 326, 327, 329, 333, 336, 338, 339, 344, 346, 347, 348, 350, 351, 353, 356, 358, 359, 361, 365, 369, 372, 374, 375, 377 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[ Range[ 400 ], (Count[ IntegerDigits[ #, 4 ], 1 ]==3)& ]`
	CROSSREFS	`Sequence in context: A123779 A123839 A043339 this_sequence A045124 A045100 A038471` `Adjacent sequences: A023709 A023710 A023711 this_sequence A023713 A023714 A023715`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified November 27 22:38 EST 2009. Contains 167602 sequences.

AT&T Labs Research