Ascent sequences avoiding subsets of the patterns 0101, 0102, 0112, 0120, 0121 fall into 16 Wilf classes with enumerations including Catalan and Fibonacci numbers.
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Simultaneous avoidance of length-4 patterns in ascent sequences
Ascent sequences avoiding subsets of the patterns 0101, 0102, 0112, 0120, 0121 fall into 16 Wilf classes with enumerations including Catalan and Fibonacci numbers.