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A225871 as a simple table

na(n)
14
26
37
49
510
611
712
813
915
1016
1117
1218
1318
1419
1520
1621
1722
1823
1924
2025
2125
2226
2327
2428
2528
2629
2730
2831
2932
3032
3133
3234
3334
3435
3536
3637
3737
3838
3939
4039
4140
4241
4341
4442
4543
4643
4744
4845
4945
5046
5146
5247
5348
5448
5549
5650
5750
5851
5951
6052
6153
6253
6354
6454
6555
6656

[4,6,7,9,10,11,12,13,15,16,17,18,18,19,20,21,22,
 23,24,25,25,26,27,28,28,29,30,31,32,32,33,34,34,
 35,36,37,37,38,39,39,40,41,41,42,43,43,44,45,45,
 46,46,47,48,48,49,50,50,51,51,52,53,53,54,54,55,
 56]