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A254007 as a simple table

na(n)
01
11
22
34
47
513
622
740
866
9118
10192
11338
12546
13948
141526
152618
164208
177146
1811482
1919332
2031070
2151938
2283520
23138786
24223330
25369284
26594662
27979306
281578064
292590138
304176394
316836164
3211028942
3318012562

[1,1,2,4,7,13,22,40,66,118,192,338,546,948,1526,
 2618,4208,7146,11482,19332,31070,51938,83520,
 138786,223330,369284,594662,979306,1578064,
 2590138,4176394,6836164,11028942,18012562]