|
EXAMPLE
|
a(2) = 23: [1,4,4,4], [2,4,4,4], [3,3,3,3], [3,3,3,4], [3,3,4,3], [3,3,4,4], [3,4,3,3], [3,4,3,4], [3,4,4,3], [3,4,4,4], [4,1,4,4], [4,2,4,4], [4,3,3,3], [4,3,3,4], [4,3,4,3], [4,3,4,4], [4,4,1,4], [4,4,2,4], [4,4,3,3], [4,4,3,4], [4,4,4,1], [4,4,4,2], [4,4,4,3].
|