A031242 Length of n-th run of digit 0 in A031235.

1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1

Offset: 1

Author

Clark Kimberling

Keywords

• nonn
• base

Comments

Differs from A031226 whenever a base 5 sequence of a number is inserted which has a non-palindromic sequence of run-lengths of 0. Happens first scanning 10010_5 = 630_10 which is inserted in A031235 as 01001 (run lengths 1,2) but in A031219 as 10010 (run lengths 2,1). - R. J. Mathar, Jul 23 2025

Extensions

a(1)=1 inserted for consistency with change in A031235 by Sean A. Irvine, Apr 19 2020