OFFSET
2,1
EXAMPLE
The 22 paths in a 2 X 2 grid whose nodes are numbered from 1 to 4 in the natural way are 124, 134, 12124, 12134, 12424, 12434, 13124, 13134, 13424, 13434, 1212434, 1213424, 1213434, 1242134, 1243124, 1243134, 1312424, 1312434, 1313424, 1342124, 1342134, 1343124. - Giovanni Resta, Mar 24 2014
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Muhammad Kholilurrohman, Jan 09 2014
EXTENSIONS
a(5)-a(6) from Muhammad Kholilurrohman, Nov 13 2014
STATUS
approved