The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A294601 Numbers with exactly one odd decimal digit. 1
 1, 3, 5, 7, 9, 10, 12, 14, 16, 18, 21, 23, 25, 27, 29, 30, 32, 34, 36, 38, 41, 43, 45, 47, 49, 50, 52, 54, 56, 58, 61, 63, 65, 67, 69, 70, 72, 74, 76, 78, 81, 83, 85, 87, 89, 90, 92, 94, 96, 98, 100, 102, 104, 106, 108, 120, 122, 124, 126, 128, 140, 142, 144, 146, 148, 160, 162, 164, 166, 168, 180 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS First differs from A054684 at position 56. Numbers n such that A196564(n) = 1. - Felix Fröhlich, Nov 03 2017 There are (1+4*d)*5^(d-1) = 5*A081040(d+1) terms with d digits. - Robert Israel, Nov 06 2017 LINKS Robert Israel, Table of n, a(n) for n = 1..10000 MAPLE Res:= NULL: for t from 0 to 1000 do   if nops(select(type, convert(t, base, 10), odd))=1 then Res:= Res, t fi od: Res; MATHEMATICA Select[Range@ 200, Count[IntegerDigits@ #, _?OddQ] == 1 &] (* Michael De Vlieger, Nov 03 2017 *) PROG (PARI) a196564(n) = #select(x->x%2, digits(n)) \\ after Michel Marcus is(n) = a196564(n)==1 \\ Felix Fröhlich, Nov 03 2017 CROSSREFS Cf. A014263, A054684, A081040, A196564, A275775. Sequence in context: A308412 A327254 A054684 * A080207 A187347 A187413 Adjacent sequences:  A294598 A294599 A294600 * A294602 A294603 A294604 KEYWORD nonn,base,look AUTHOR Robert Israel, Nov 03 2017 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified November 25 20:20 EST 2020. Contains 338627 sequences. (Running on oeis4.)