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A237212 as a simple table

na(n)
1256
21076
34770
422420
5107092
6523218
72580120
812870804
964634026
10326922108
111661903764
128491149474
1343548443400
14224187558716
151157390767538
165992234819668
1731088874374020
18161649774718450
19841795869921768

[256,1076,4770,22420,107092,523218,2580120,
 12870804,64634026,326922108,1661903764,8491149474,
 43548443400,224187558716,1157390767538,
 5992234819668,31088874374020,161649774718450,
 841795869921768]