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A255656 as a simple table

na(n)
1968
23692
314192
454560
5209412
6803246
73083292
811835664
945429680
10174365744
11669261344
122568836929
139859943512
1437845226102
15145260624176
16557551963747
172140043779888
188214097736920
1931528047115872
20121013635650740

[968,3692,14192,54560,209412,803246,3083292,
 11835664,45429680,174365744,669261344,2568836929,
 9859943512,37845226102,145260624176,557551963747,
 2140043779888,8214097736920,31528047115872,
 121013635650740]