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A001978 as a simple table

na(n)
00
11
23
38
416
532
655
794
8147
9227
10332
11480
12668
13920
141232
151635
162124
172738
183470
194368
205424
216695
228172
239922
2411934
2514287
2616968
2720068
2823572
2927584
3032087
3137199
3242901
3349325
3456450
3564424
3673223
3783012
3893764
39105661
40118674
41133003
42148616

[0,1,3,8,16,32,55,94,147,227,332,480,668,920,1232,
 1635,2124,2738,3470,4368,5424,6695,8172,9922,
 11934,14287,16968,20068,23572,27584,32087,37199,
 42901,49325,56450,64424,73223,83012,93764,105661,
 118674,133003,148616]