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!)
A080479 Smallest number formed by using all the digits (with multiplicity) of next n numbers. 6
1, 23, 456, 10789, 1111112345, 101111226789, 22222222345678, 1022333333334569, 102333344444445789, 10234444455555556789, 1023455555666666666789, 102345666677777777777889, 10012345677888888888889999, 1000000011111122334455678999999999 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..14.

PROG

(Python)

def a(n):

  s = "".join(sorted("".join(map(str, range((n-1)*n//2+1, n*(n+1)//2+1)))))

  if '0' not in s: return int(s)

  rz = s.rfind('0')

  return int(s[rz+1] + s[:rz+1] + s[rz+2:])

print([a(n) for n in range(1, 15)]) # Michael S. Branicky, Jan 23 2021

CROSSREFS

Cf. A053067 (next n concatenated), A080480 (largest).

Sequence in context: A066547 A001369 A007923 * A053067 A036906 A134733

Adjacent sequences:  A080476 A080477 A080478 * A080480 A080481 A080482

KEYWORD

base,easy,nonn

AUTHOR

Amarnath Murthy, Mar 11 2003

EXTENSIONS

More terms from Antonio G. Astudillo (afg_astudillo(AT)lycos.com), Apr 19 2003

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 September 29 13:58 EDT 2022. Contains 357090 sequences. (Running on oeis4.)