id:A023719 - OEIS Search Results

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Numbers with exactly 2 3's in base 4 expansion.

+0
2

15, 31, 47, 51, 55, 59, 60, 61, 62, 79, 95, 111, 115, 119, 123, 124, 125, 126, 143, 159, 175, 179, 183, 187, 188, 189, 190, 195, 199, 203, 204, 205, 206, 211, 215, 219, 220, 221, 222, 227, 231, 235, 236, 237, 238, 240, 241, 242 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[ Range[ 260 ], (Count[ IntegerDigits[ #, 4 ], 3 ]==2)& ]`
	CROSSREFS	`Sequence in context: A041440 A042017 A043346 this_sequence A031467 A045063 A044076` `Adjacent sequences: A023716 A023717 A023718 this_sequence A023720 A023721 A023722`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research