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A120664 as a simple table

na(n)
00
12
24
318
492
5442
62004
78738
837132
9155082
10640004
112619058
1210653372
1343144922
14174174004
15701478978
162820264812
1711324105962
1845425564004
19182089676498
20729520967452
212921570654202
2211696742970004
2346818352939618

[0,2,4,18,92,442,2004,8738,37132,155082,640004,
 2619058,10653372,43144922,174174004,701478978,
 2820264812,11324105962,45425564004,182089676498,
 729520967452,2921570654202,11696742970004,
 46818352939618]