# A053897 (b-file synthesized from sequence entry)
1 1
2 4
3 144
4 441
5 1444
6 115111441
7 1551414544
8 441411414544
9 115414455444544
10 41155551514151451441
11 114515541511151545444
12 5115115541555411411554441
13 5411144145154411455544144144