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A131992 as a simple table

na(n)
131
2121
3781
42801
516105
630941
788741
8137561
9292561
10732541
11954305
121926221
132896405
143500201
154985761
168042221
1712326281
1814076605
1920456441
2025774705
2128792661
2239449441
2348037081
2463455221
2589451461
26105101005
27113654321

[31,121,781,2801,16105,30941,88741,137561,292561,
 732541,954305,1926221,2896405,3500201,4985761,
 8042221,12326281,14076605,20456441,25774705,
 28792661,39449441,48037081,63455221,89451461,
 105101005,113654321]