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A049974 as a simple table

na(n)
11
23
33
48
518
634
770
8140
9285
10563
111128
122256
134517
149044
1518104
1636244
1772558
18144977
19289956
20579912
211159829
222319668
234639352
249278740
2518557550
2637115245
2774230768
28148462101
29296925330
30593852921
311187710369
322375429798

[1,3,3,8,18,34,70,140,285,563,1128,2256,4517,9044,
 18104,36244,72558,144977,289956,579912,1159829,
 2319668,4639352,9278740,18557550,37115245,
 74230768,148462101,296925330,593852921,1187710369,
 2375429798]