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A359141
First differences of the pancake flipping (or sorting by prefix reversal) sequence A058986.
1
1, 2, 1, 1, 2, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 1, 2
OFFSET
1,2
COMMENTS
A comment in A058986 implies that the terms are at most 2. Furthermore a zero term seems unlikely.
The initial terms consist of runs of 1, 2, 4, and 7 1's separated by 2's, which allows for a large number of extensions.
CROSSREFS
Cf. A058986.
Sequence in context: A034002 A276630 A176048 * A366785 A322480 A251683
KEYWORD
nonn,more
AUTHOR
N. J. A. Sloane, Jan 26 2023
STATUS
approved