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A218913
as a simple table
n
a(n)
0
1
1
1
2
2
3
4
4
8
5
13
6
21
7
31
8
49
9
74
10
113
11
139
12
216
13
268
[1,1,2,4,8,13,21,31,49,74,113,139,216,268]