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A230554 as a simple table

na(n)
01
11
22
34
49
521
651
7126
8321
9820
102160
115654
1215272
1340758
14112280
15304471
16852164
172341980
186640755
1918460066
2052915999

[1,1,2,4,9,21,51,126,321,820,2160,5654,15272,
 40758,112280,304471,852164,2341980,6640755,
 18460066,52915999]