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A253857 as a simple table

na(n)
13264
230848
3291392
42654464
522951616
6196953728
71698464064
814584992256
9125182611904
101074628170624
119217329596480
1279050564905728
13678127033451712
145816974582413440
1549896386833688384
16428003374084414464

[3264,30848,291392,2654464,22951616,196953728,
 1698464064,14584992256,125182611904,1074628170624,
 9217329596480,79050564905728,678127033451712,
 5816974582413440,49896386833688384,
 428003374084414464]