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A025228 as a simple table

na(n)
12
21
34
417
576
6354
71704
88421
942508
10218318
111137400
125996938
1331940792
14171605956
15928931280
165061593709
1727739833228
18152809506582
19845646470616
204699126915422
2126209721959656
22146681521121244
23823429928805936
244635568494271458

[2,1,4,17,76,354,1704,8421,42508,218318,1137400,
 5996938,31940792,171605956,928931280,5061593709,
 27739833228,152809506582,845646470616,
 4699126915422,26209721959656,146681521121244,
 823429928805936,4635568494271458]