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A129400 as a simple table

na(n)
01
12
28
332
4144
5672
63264
716256
882688
9427520
102240512
1111874304
1263533056
13342712320
141861779456
1510176823296
1655932813312
17308907737088
181713473323008
199541666209792
2053322206674944
21298943898451968

[1,2,8,32,144,672,3264,16256,82688,427520,2240512,
 11874304,63533056,342712320,1861779456,
 10176823296,55932813312,308907737088,
 1713473323008,9541666209792,53322206674944,
 298943898451968]