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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A277028 Numbers that are never pandigital for any base b > 1. 1
 0, 1, 3, 7, 31, 255, 32767 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,3 COMMENTS Here, a number is considered pandigital in base b if any digit from 0 to b-1 appears at least once in its base b representation (ignoring leading zeros). This is a subsequence of A000225, conjectured to be finite (no other term below 2^1000000). No other terms below 2^10^10. - Charles R Greathouse IV, Sep 26 2016 LINKS Table of n, a(n) for n=1..7. Rémy Sigrist, PARI/GP program for A277028 EXAMPLE 32767 is not pandigital in any base b between 2 and 6: b 32767 in base b Missing digits - --------------- -------------- 2 111111111111111 0 3 1122221121 0 4 13333333 0, 2 5 2022032 1, 4 6 411411 0, 2, 3, 5 Moreover, 32767 is too small to be pandigital in any base b > 6, hence 32767 is in the sequence. PROG (PARI) See Sigrist link. CROSSREFS Cf. A055085, A171102. Sequence in context: A030521 A105767 A063896 * A156895 A074047 A121810 Adjacent sequences: A277025 A277026 A277027 * A277029 A277030 A277031 KEYWORD nonn,base AUTHOR Rémy Sigrist, Sep 25 2016 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.

Last modified May 28 01:39 EDT 2023. Contains 362992 sequences. (Running on oeis4.)