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A337698 as a simple table

na(n)
00
10
21
32
46
513
628
759
8122
9248
10502
111012
122033
134078
148170
1516357
1632736
1765498
18131026
19262090
20524224
211048500
222097063
234194200
248388486
2516777074
2633554267
2767108672
28134217506
29268435200
30536870616
311073741484
322147483258
334294966848
348589934080

[0,0,1,2,6,13,28,59,122,248,502,1012,2033,4078,
 8170,16357,32736,65498,131026,262090,524224,
 1048500,2097063,4194200,8388486,16777074,33554267,
 67108672,134217506,268435200,536870616,1073741484,
 2147483258,4294966848,8589934080]