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A162740 as a simple table

na(n)
01
14
212
330
472
5168
6390
7900
82076
94782
1011016
1125368
1258422
13134532
14309804
15713406
161642824
173783048
188711526
1920060676
2046195260
21106377294
22244963080
23564094968
241298984214
252991269124
266888221772
2715862029150
2836526694472
2984112781928
30193692865350

[1,4,12,30,72,168,390,900,2076,4782,11016,25368,
 58422,134532,309804,713406,1642824,3783048,
 8711526,20060676,46195260,106377294,244963080,
 564094968,1298984214,2991269124,6888221772,
 15862029150,36526694472,84112781928,193692865350]