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A156945 as a simple table

na(n)
01
14
212
336
4108
5314
6906
72576
87280
920352
1056664
11156570
12431238
131180968
143225940
158773036
1623809148
1764388402
18173829458
19467950860
201257901236
213373450744
229035758992
2324155031526
2464504264538
25171971885000
26458064299228
271218407840776
283238253213404
298596370674894

[1,4,12,36,108,314,906,2576,7280,20352,56664,
 156570,431238,1180968,3225940,8773036,23809148,
 64388402,173829458,467950860,1257901236,
 3373450744,9035758992,24155031526,64504264538,
 171971885000,458064299228,1218407840776,
 3238253213404,8596370674894]