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A080961 as a simple table

na(n)
01
19
257
3321
41713
58889
645417
7230001
81158753
95820009
1029178777
11146130081
12731358993
133658920729
1418300980937
1591524036561
16457677578433
172288560079049
1811443316955897
1957218134461441
20286095321353073
211430490553902969
227152494610927657
2335762598578876721

[1,9,57,321,1713,8889,45417,230001,1158753,
 5820009,29178777,146130081,731358993,3658920729,
 18300980937,91524036561,457677578433,
 2288560079049,11443316955897,57218134461441,
 286095321353073,1430490553902969,7152494610927657,
 35762598578876721]