login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A038687 Concatenate i >= 1 and j >= 1, then sort. 3
11, 12, 13, 14, 15, 16, 17, 18, 19, 21, 22, 23, 24, 25, 26, 27, 28, 29, 31, 32, 33, 34, 35, 36, 37, 38, 39, 41, 42, 43, 44, 45, 46, 47, 48, 49, 51, 52, 53, 54, 55, 56, 57, 58, 59, 61, 62, 63, 64, 65, 66, 67, 68, 69, 71, 72, 73, 74, 75, 76, 77, 78, 79, 81, 82, 83, 84, 85, 86, 87, 88, 89, 91, 92, 93, 94, 95, 96, 97, 98, 99, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Numbers with at least two nonzero decimal digits. - Charles R Greathouse IV, Jan 13 2015
LINKS
FORMULA
a(n) = n + O(log n). - Charles R Greathouse IV, Jan 13 2015
MAPLE
isA038687 := proc(n)
local nzdigs, d ;
nzdigs := 0 ;
for d in convert(n, base, 10) do
if d > 0 then
nzdigs := nzdigs+1 ;
end if ;
end do:
simplify(nzdigs>=2 ) ;
end proc:
for n from 1 to 120 do
if isA038687(n) then
printf("%d, ", n) ;
end if;
end do: # R. J. Mathar, May 25 2023
MATHEMATICA
Select[Range[150], Total[Most[DigitCount[#]]]>1&] (* Harvey P. Dale, Dec 15 2023 *)
PROG
(PARI) is(n)=n/=10^valuation(n, 10); n>9 \\ Charles R Greathouse IV, Jan 13 2015
CROSSREFS
Sequence in context: A178405 A162903 A216589 * A359983 A236403 A293728
KEYWORD
nonn,base,easy
AUTHOR
STATUS
approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified March 28 12:26 EDT 2024. Contains 371254 sequences. (Running on oeis4.)