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A156740 as a simple table

na(n)
01
11
21
31
4153
51
61
74845
84845
91
101
1174613
122362745
1374613
141
151
16735471
17358664691
18358664691
19735471
201
211
225311735
2325533510145
24393216056233
2525533510145
265311735
271
281
2930421755
301056158828725
31160324910200455
32160324910200455
331056158828725
3430421755
351

[1,1,1,1,153,1,1,4845,4845,1,1,74613,2362745,
 74613,1,1,735471,358664691,358664691,735471,1,1,
 5311735,25533510145,393216056233,25533510145,
 5311735,1,1,30421755,1056158828725,
 160324910200455,160324910200455,1056158828725,
 30421755,1]