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A006148 as a simple table

na(n)
01
15
222
387
4317
51053
63250
79343
825207
964167
10155004
11357009
12787586
131670643
143419552
156774765
1613027340
1724372942
1844462456
1979240762
20138204782
21236258358
22396409924
23653639898
241060379169
251694174350
262668300758
274146300078
286361709115
299644583474

[1,5,22,87,317,1053,3250,9343,25207,64167,155004,
 357009,787586,1670643,3419552,6774765,13027340,
 24372942,44462456,79240762,138204782,236258358,
 396409924,653639898,1060379169,1694174350,
 2668300758,4146300078,6361709115,9644583474]