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A045625 as a simple table

na(n)
01
12
21
34
47
518
629
770
8126
9266
10507
111054
122037
134158
148183
1516488
1632760
1765790
18131026
19262654
20524265
211049524
222097119
234196350
248388450
2516781292
2633554367
2767116784
28134217657
29268451838
30536870247
311073774590
322147483520

[1,2,1,4,7,18,29,70,126,266,507,1054,2037,4158,
 8183,16488,32760,65790,131026,262654,524265,
 1049524,2097119,4196350,8388450,16781292,33554367,
 67116784,134217657,268451838,536870247,1073774590,
 2147483520]