A376300 Numbers whose digits can be rearranged to form a substring of 123456789012345678901234....

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 21, 23, 32, 34, 43, 45, 54, 56, 65, 67, 76, 78, 87, 89, 90, 98, 102, 109, 120, 123, 132, 190, 201, 210, 213, 231, 234, 243, 312, 321, 324, 342, 345, 354, 423, 432, 435, 453, 456, 465, 534, 543, 546, 564, 567, 576

Offset: 1

Author

Andrew Howroyd, Sep 19 2024

Keywords

• nonn
• base

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A068708, A068710, A068804.

Programs

PARI

isok(n)={my(f=vector(10)); foreach(digits(n), t, f[1+t]++); vecmax(f)<=vecmin(f)+1 && sum(k=1, 9, f[k]!=f[k+1])<=2}