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A056080 as a simple table

na(n)
51
62
714
849
9131
10248
11410
12531
13601
14566
15474
16336
17222
18124
1967
2032
2116
226
233
241
251

[1,2,14,49,131,248,410,531,601,566,474,336,222,
 124,67,32,16,6,3,1,1]