A124476 Smallest multiple of A047201(n) (i.e., numbers not divisible by 5) with only digits 6 and 7.

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

Offset

1,1

Links

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

Nick 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 &] (* Ray Chandler, Dec 18 2006 *)

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