A023721 Numbers with no 0's in their base-5 expansion.

1, 2, 3, 4, 6, 7, 8, 9, 11, 12, 13, 14, 16, 17, 18, 19, 21, 22, 23, 24, 31, 32, 33, 34, 36, 37, 38, 39, 41, 42, 43, 44, 46, 47, 48, 49, 56, 57, 58, 59, 61, 62, 63, 64, 66, 67, 68, 69, 71, 72, 73, 74, 81, 82, 83, 84, 86, 87, 88, 89, 91, 92, 93

Offset

1,2

Links

Nathaniel Johnston, Table of n, a(n) for n = 1..10000

Index entries for 5-automatic sequences.

Maple

seq(`if`(numboccur(0, convert(n, base, 5))=0, n, NULL), n=1..127); # Nathaniel Johnston, Jun 27 2011

Mathematica

Select[ Range[ 120 ], (Count[ IntegerDigits[ #, 5 ], 0 ]==0)& ]

Prog

(PARI) is(n)=while(n, if(n%5==0, return(0)); n\=5); 1 \\ Charles R Greathouse IV, Feb 12 2017

Crossrefs

Cf. A020654, A023725, A023729, A023733.

Sequence in context: A047201 A225496 A261189 * A087066 A120518 A101888

Adjacent sequences: A023718 A023719 A023720 * A023722 A023723 A023724

Keyword

nonn,base,easy

Author

Olivier Gérard

Status

approved