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A006408 as a simple table

na(n)
24
339
4190
5651
61792
74242
88988
917490
1031812
1154769
1290090
13142597
14218400
15325108
16472056
17670548
18934116
191278795
201723414
212289903
223003616
233893670
244993300
256340230
267977060
279951669
2812317634
2915134665
3018469056
3122394152
3226990832
3332348008
3438563140

[4,39,190,651,1792,4242,8988,17490,31812,54769,
 90090,142597,218400,325108,472056,670548,934116,
 1278795,1723414,2289903,3003616,3893670,4993300,
 6340230,7977060,9951669,12317634,15134665,
 18469056,22394152,26990832,32348008,38563140]