A023739 Numbers with exactly 2 4's in base 5 expansion.

24, 49, 74, 99, 104, 109, 114, 119, 120, 121, 122, 123, 149, 174, 199, 224, 229, 234, 239, 244, 245, 246, 247, 248, 274, 299, 324, 349, 354, 359, 364, 369, 370, 371, 372, 373, 399, 424, 449, 474, 479, 484, 489, 494, 495, 496

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..3000

Mathematica

Select[ Range[ 500 ], (Count[ IntegerDigits[ #, 5 ], 4 ]==2)& ]

Crossrefs

Sequence in context: A042138 A042136 A043366 * A031475 A045204 A044101

Adjacent sequences: A023736 A023737 A023738 * A023740 A023741 A023742

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved