The upper-trimmed subsequence of 
is the sequence 
obtained by dropping the first occurrence of 
for each 
.
If 
is a fractal sequence, then 
.
Upper-Trimmed Subsequence
See also
Lower-Trimmed SubsequenceExplore with Wolfram|Alpha
References
Kimberling, C. "Fractal Sequences and Interspersions." Ars Combin. 45, 157-168, 1997.Referenced on Wolfram|Alpha
Upper-Trimmed SubsequenceCite this as:
Weisstein, Eric W. "Upper-Trimmed Subsequence." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/Upper-TrimmedSubsequence.html