OFFSET
0,4
COMMENTS
A succession of a permutation p is a position i such that p(i+1)-p(i) = 1.
EXAMPLE
For n=4 we have 1324, 1432, 2431, 3214, 3241, 4132 and 4213.
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Jon Perry, Jan 19 2013
EXTENSIONS
a(11)-a(14) from Alois P. Heinz, Jan 20 2013
a(15)-a(21) from Alois P. Heinz, Jul 04 2021
STATUS
approved