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A118456 as a simple table

na(n)
12
24
312
460
5300
62100
714700
8161700
91778700
1019565700
11215222700
122797895100
1336372636300
14618334817100
1510511691890700
16178698762141900
173037878956412300
1857719700171833700
191096674303264840300
2025223508975091326900
21580140706427100518700
2213343236247823311930100

[2,4,12,60,300,2100,14700,161700,1778700,19565700,
 215222700,2797895100,36372636300,618334817100,
 10511691890700,178698762141900,3037878956412300,
 57719700171833700,1096674303264840300,
 25223508975091326900,580140706427100518700,
 13343236247823311930100]