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A025603 as a simple table

na(n)
01
121
2465
310565
4241697
55539893
6127041105
72913686981
866827609633
91532754884725
1035155272163473
11806321934125125
1218493816732267425
13424174583966543669
149728877611505065297
15223141752041771533125
165117984163043834408865
17117386198048567829057141

[1,21,465,10565,241697,5539893,127041105,
 2913686981,66827609633,1532754884725,
 35155272163473,806321934125125,18493816732267425,
 424174583966543669,9728877611505065297,
 223141752041771533125,5117984163043834408865,
 117386198048567829057141]