A226637 Numbers m having with m+1 no common digit in decimal representations.

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 19, 29, 39, 49, 59, 69, 79, 99, 199, 299, 399, 499, 599, 699, 799, 999, 1999, 2999, 3999, 4999, 5999, 6999, 7999, 9999, 19999, 29999, 39999, 49999, 59999, 69999, 79999, 99999, 199999, 299999, 399999

Offset: 1

Author

Reinhard Zumkeller, Sep 01 2013

Keywords

• nonn
• base

Crossrefs

Cf. A000030, A076489.

Programs

Haskell

a226637 n = a226637_list !! (n-1)
a226637_list = filter ((== 0) . a076489) [0..]

PARI

isok(k) = #setintersect(Set(digits(k)), Set(digits(k+1))) == 0; \\ Michel Marcus, Feb 07 2025

Formula

A076489(a(n)) = 0;

A000030(a(n)) <> 8 for n > 9.