OFFSET
1,1
EXAMPLE
117 is in the sequence with permutations
(7,6,...,2,1,117,116,...,9,8) and
(26,25,...,2,1,98,97,...28,27,117,116,...,100,99)
CROSSREFS
KEYWORD
nonn
AUTHOR
Ray Chandler, Jul 25 2004
STATUS
approved