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A041423 as a simple table

na(n)
01
115
2451
36780
4203851
53064545
692140201
71385167560
841647167001
9626092672575
1018824427344251
11282992502836340
128508599512434451
13127911985189353105
143845868155193027601
1557815934313084767120
161738323897547736041201

[1,15,451,6780,203851,3064545,92140201,1385167560,
 41647167001,626092672575,18824427344251,
 282992502836340,8508599512434451,
 127911985189353105,3845868155193027601,
 57815934313084767120,1738323897547736041201]