login
This site is supported by donations to The OEIS Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A124476 Smallest multiple of A047201(n) (i.e., numbers not divisible by 5) with only digits 6 and 7. 0
67, 76, 6777, 76, 7776, 6776, 776, 6777, 6677, 7776, 676, 6776, 7776, 6766, 7776, 76, 67767, 6776, 667, 7776, 676, 6777, 6776, 667, 67766, 7776, 66777777, 6766, 7776, 666777, 76, 77766, 7667, 76776, 676777, 6776, 67666, 667776, 7776, 67767, 67677 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..41.

N. Hobson, Solution to Puzzle 80:"Sixes and sevens" (generalization of)

MATHEMATICA

f[n_] := Block[{k = n}, While[Union @ IntegerDigits[k] != {6, 7}, k += n]; k]; f /@ Select[Range[52], Mod[ #, 5] > 0 &] (*Chandler*)

CROSSREFS

Sequence in context: A039432 A043255 A044035 * A066475 A106930 A106929

Adjacent sequences:  A124473 A124474 A124475 * A124477 A124478 A124479

KEYWORD

nonn,base

AUTHOR

Lekraj Beedassy, Dec 17 2006

EXTENSIONS

Corrected and extended by Ray Chandler, Dec 18 2006

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.

License Agreements, Terms of Use, Privacy Policy. .

Last modified February 22 09:43 EST 2019. Contains 320390 sequences. (Running on oeis4.)