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A188498 as a simple table

na(n)
00
11
22
33
48
530
6102
7308
8905
92744
108473
1126112
1279924
13244204
14747160
152288521
167009458
1721461803
1865704200
19201162258
20615922714
211885853660
225774072225
2317678809840
2454128358209
25165728860112
26507424764216
271553620027784
284756831354752

[0,1,2,3,8,30,102,308,905,2744,8473,26112,79924,
 244204,747160,2288521,7009458,21461803,65704200,
 201162258,615922714,1885853660,5774072225,
 17678809840,54128358209,165728860112,507424764216,
 1553620027784,4756831354752]