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A045687 as a simple table

na(n)
00
10
20
32
44
512
624
756
8112
9238
10480
11992
121980
134032
148064
1516242
1632512
1765280
18130536
19261632
20523260
211047494
222095104
234192256
248384400
2516773108
2633546240
2767100432
28134201340
29268419072
30536837640
311073709056
322147418112

[0,0,0,2,4,12,24,56,112,238,480,992,1980,4032,
 8064,16242,32512,65280,130536,261632,523260,
 1047494,2095104,4192256,8384400,16773108,33546240,
 67100432,134201340,268419072,536837640,1073709056,
 2147418112]