A031882 Repdigital lucky numbers.

1, 3, 7, 9, 33, 99, 111, 777, 9999, 33333, 55555, 111111, 777777, 7777777, 55555555

Offset

1,2

Comments

a(16) > 10^8. - Robert G. Wilson v, May 12 2006

a(16) > 10^9. - Luke March, Jul 22 2014

Links

Table of n, a(n) for n=1..15.

Mathematica

lst=Range[1, 10^7, 2]; i = 2; While[lst[[i]]<=Length[lst], del=Partition[Range[lst[[i]], Length[lst], lst[[i]]], 1]; lst=Delete[lst, del]; i++ ]; lst=Select[lst, (Length[Union[IntegerDigits[ # ]]]==1)&] (* Robert G. Wilson v, May 12 2006 *)

Crossrefs

Intersection of A000959 and A010785.

Subset of A309406.

Sequence in context: A376337 A328233 A031161 * A199190 A075982 A100839

Adjacent sequences: A031879 A031880 A031881 * A031883 A031884 A031885

Keyword

base,nonn,more

Author

Patrick De Geest

Extensions

Two more terms from Vit Planocka (planocka(AT)mistral.cz), Feb 01 2003

a(15) from Robert G. Wilson v, May 12 2006

Status

approved