login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A254323
Remove in decimal representation of A254143(n) all repeated digits.
4
1, 4, 7, 16, 28, 34, 37, 49, 67, 136, 148, 238, 259, 268, 34, 37, 367, 469, 67, 156, 1258, 136, 1348, 1369, 1468, 278, 238, 2359, 2479, 2569, 268, 34, 37, 367, 367, 489, 469, 67, 1356, 1458, 12358, 12469, 12478, 136, 1348, 13468, 13579, 1468, 2378, 2579
OFFSET
1,2
COMMENTS
a(n) <= 123456789 for all n, and a(n) < 123456789 for n < 396;
a(396) = 123456789 = A050289(1);
LINKS
PROG
(Haskell)
a254323 = a137564 . a254143
CROSSREFS
Cf. A254338 (initial digits), A254339 (final digits).
Sequence in context: A259653 A164123 A005513 * A254143 A025619 A093210
KEYWORD
nonn,base
AUTHOR
Reinhard Zumkeller, Jan 28 2015
STATUS
approved