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A230555 as a simple table

na(n)
01
11
22
34
410
525
666
7173
8460
91218
103240
118602
1222878
1360794
14161668
15429752
161142758
173038173
188078606
1921479469
2057113888

[1,1,2,4,10,25,66,173,460,1218,3240,8602,22878,
 60794,161668,429752,1142758,3038173,8078606,
 21479469,57113888]