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A039721 as a simple table

na(n)
11
22
34
412
532
696
7280
8840
92496
107488
1122400
1267200
13201408
14604224
151812112
165436336
1716307328
1848921984
19146760960
20440282880
211320833664
223962500992
2311887458176
2435662374528
25106986989184
26320960967552
27962882499840
282888647499520
298665941290112

[1,2,4,12,32,96,280,840,2496,7488,22400,67200,
 201408,604224,1812112,5436336,16307328,48921984,
 146760960,440282880,1320833664,3962500992,
 11887458176,35662374528,106986989184,320960967552,
 962882499840,2888647499520,8665941290112]