id:A023720 - OEIS Search Results

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

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63, 127, 191, 207, 223, 239, 243, 247, 251, 252, 253, 254, 319, 383, 447, 463, 479, 495, 499, 503, 507, 508, 509, 510, 575, 639, 703, 719, 735, 751, 755, 759, 763, 764, 765, 766, 783, 799, 815, 819, 823, 827, 828, 829, 830 (list; graph; listen)

	OFFSET	`1,1`
	MATHEMATICA	`Select[ Range[ 864 ], (Count[ IntegerDigits[ #, 4 ], 3 ]==3)& ]`
	CROSSREFS	`Sequence in context: A038865 A096023 A080947 this_sequence A031468 A045064 A043450` `Adjacent sequences: A023717 A023718 A023719 this_sequence A023721 A023722 A023723`
	KEYWORD	`nonn,base,easy`
	AUTHOR	`Olivier Gerard (olivier.gerard(AT)gmail.com)`

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.

AT&T Labs Research