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A001872 as a simple table

na(n)
01
14
214
340
4105
5256
6594
71324
82860
96020
1012402
1125088
1249963
1398160
14190570
15366108
16696787
171315072
182463300
194582600
208472280
2115574520
2228481220
2351833600
2493914325
25169457708
26304597382
27545556512
28973877245
291733053440
303075011478

[1,4,14,40,105,256,594,1324,2860,6020,12402,25088,
 49963,98160,190570,366108,696787,1315072,2463300,
 4582600,8472280,15574520,28481220,51833600,
 93914325,169457708,304597382,545556512,973877245,
 1733053440,3075011478]