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A002460 as a simple table

na(n)
12
25
310
420
540
686
7192
8440
91038
102492
116071
1214960
1337198
1493193
15234956
16595561
171516638
183877904
199950907
2025615653
2166127186
22171144671
23443966370
241154115392
253005950907
267842940992
2720496497120
2853645118592
29140599195758

[2,5,10,20,40,86,192,440,1038,2492,6071,14960,
 37198,93193,234956,595561,1516638,3877904,9950907,
 25615653,66127186,171144671,443966370,1154115392,
 3005950907,7842940992,20496497120,53645118592,
 140599195758]