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A137636 as a simple table

na(n)
01
14
219
394
4474
52431
612609
765972
8347524
91840680
109792986
1152296799
12280163091
131504969409
148103433329
1543722788132
16236340999038
171279602656590
186938126362948
1937668424608552
20204751452911832
211114151447523038

[1,4,19,94,474,2431,12609,65972,347524,1840680,
 9792986,52296799,280163091,1504969409,8103433329,
 43722788132,236340999038,1279602656590,
 6938126362948,37668424608552,204751452911832,
 1114151447523038]