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A024718 as a simple table

na(n)
01
12
25
315
450
5176
6638
72354
88789
933099
10125477
11478193
121830271
137030571
1427088871
15104647631
16405187826
171571990936
186109558586
1923782190486
2092705454896
21361834392116
221413883873976
235530599237776
2421654401079326
2584859704298202
26332818970772254

[1,2,5,15,50,176,638,2354,8789,33099,125477,
 478193,1830271,7030571,27088871,104647631,
 405187826,1571990936,6109558586,23782190486,
 92705454896,361834392116,1413883873976,
 5530599237776,21654401079326,84859704298202,
 332818970772254]