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A048512 as a simple table

na(n)
01
165
2210
3536
41264
52880
66448
714288
831440
968816
10149968
11325584
12704464
131519568
143268560
157012304
1615007696
1732047056
1868288464
19145227728
20308281296
21653262800
221382023120
232919235536
246157238224
2512968787920

[1,65,210,536,1264,2880,6448,14288,31440,68816,
 149968,325584,704464,1519568,3268560,7012304,
 15007696,32047056,68288464,145227728,308281296,
 653262800,1382023120,2919235536,6157238224,
 12968787920]