A023728 Numbers with exactly 3 1's in base 5 expansion.

31, 131, 151, 155, 157, 158, 159, 161, 166, 171, 181, 206, 231, 281, 406, 531, 631, 651, 655, 657, 658, 659, 661, 666, 671, 681, 706, 731, 751, 755, 757, 758, 759, 761, 766, 771, 775, 777, 778, 779, 785, 787, 788, 789, 790

Offset

1,1

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Mathematica

Select[ Range[ 800 ], (Count[ IntegerDigits[ #, 5 ], 1 ]==3)& ]

Crossrefs

Sequence in context: A259509 A183838 A043355 * A045259 A045244 A045229

Adjacent sequences: A023725 A023726 A023727 * A023729 A023730 A023731

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved