A032701 Exactly 5 digits from {1,2,3,4,5,6,7,8,9} can precede a(n) to form a lucky number.

19, 27, 31, 41, 253, 409, 567, 663, 827, 833, 977, 1089, 1421, 1475, 2635, 3021, 3419, 3633, 3781, 3953, 4197, 4293, 4423, 4721, 5255, 5671, 6187, 6469, 8187, 8467, 8661, 8837, 8989, 9615, 9921, 10477, 13569, 15055, 16037, 17637, 23597, 24693, 25273

Offset

1,1

Comments

Finding 6, 7, 8 and 9 preceding digits is a difficult job!

Links

Table of n, a(n) for n=1..43.

Example

If n = 977 then we find only '1'977, '2'977, '4'977, '5'977 and '8'977 to be lucky numbers.

Crossrefs

Cf. A000959.

Sequence in context: A274685 A152013 A160036 * A226726 A006626 A259054

Adjacent sequences: A032698 A032699 A032700 * A032702 A032703 A032704

Keyword

nonn,base,less

Author

Patrick De Geest, May 15 1998

Extensions

Terms > 10000 from R. J. Mathar, Oct 22 2010

Status

approved