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A042241 as a simple table

na(n)
01
12
25
312
4605
51222
63049
77320
8369049
9745418
101859885
114465188
12225119285
13454703758
141134526801
152723757360
16137322394801
17277368546962
18692059488725
191661487524412
2083766435709325
21169194358943062
22422155153595449
231013504666133960
2451097388460293449

[1,2,5,12,605,1222,3049,7320,369049,745418,
 1859885,4465188,225119285,454703758,1134526801,
 2723757360,137322394801,277368546962,692059488725,
 1661487524412,83766435709325,169194358943062,
 422155153595449,1013504666133960,
 51097388460293449]