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A032698 Exactly 2 digits from {1,2,3,4,5,6,7,8,9} can precede a(n) to form a lucky number. 0
17, 45, 55, 57, 63, 69, 75, 81, 87, 99, 101, 105, 109, 117, 129, 131, 133, 135, 147, 153, 161, 167, 169, 171, 177, 181, 187, 189, 197, 201, 203, 207, 209, 213, 215, 217, 221, 227, 243, 245, 259, 261, 269, 271, 273, 279, 281, 289, 291, 293, 303, 309, 311 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..53.

EXAMPLE

If a(n) = 303 then we find only '1'303 and '9'303 to be lucky numbers.

CROSSREFS

Cf. A000959.

Sequence in context: A227721 A140155 A221752 * A120099 A045570 A058205

Adjacent sequences:  A032695 A032696 A032697 * A032699 A032700 A032701

KEYWORD

nonn,base,less

AUTHOR

Patrick De Geest, May 15 1998

STATUS

approved

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Last modified February 21 23:29 EST 2019. Contains 320381 sequences. (Running on oeis4.)