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A013136 as a simple table

na(n)
02
116
2544
340192
45111296
5994586624
6274584084480
7102058445570048
849134745327894528
929743376752794664960
1022111413979264501940224
1119803614205698007369777152
1221031646806008885489451401216

[2,16,544,40192,5111296,994586624,274584084480,
 102058445570048,49134745327894528,
 29743376752794664960,22111413979264501940224,
 19803614205698007369777152,
 21031646806008885489451401216]