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A307451 as a simple table

na(n)
20
31
40
51
63
70
81
94
100
113
127
131
141
157
162
175
1811
196
201
217
226
233
2413
2511
263
274
289
2910
3015
319
3210
337
3410
3514
3611
379
3816
3912
406
4111
4219
4315
4412
4519
4612
4723
4822
497
5012
5119
5218
5317
5418
5511
5617
5727
5813
5920
6028
6117
629
6322
6429
6518
6626
6718
6830
6918
7015
7124
7220
7320
7428
7528
7624
7724
7818
7921
8028

[0,1,0,1,3,0,1,4,0,3,7,1,1,7,2,5,11,6,1,7,6,3,13,
 11,3,4,9,10,15,9,10,7,10,14,11,9,16,12,6,11,19,15,
 12,19,12,23,22,7,12,19,18,17,18,11,17,27,13,20,28,
 17,9,22,29,18,26,18,30,18,15,24,20,20,28,28,24,24,
 18,21,28]