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A122745 as a simple table

na(n)
31
41
52
65
712
829
972
10170
11404
12944
132184
145000
1511368
1625616
1757376
18127696
19282688
20622656
211365472
222982016
236488320
2414068672
2530409216
2665536512
27140859776
28301990912
29645924864
301378530048

[1,1,2,5,12,29,72,170,404,944,2184,5000,11368,
 25616,57376,127696,282688,622656,1365472,2982016,
 6488320,14068672,30409216,65536512,140859776,
 301990912,645924864,1378530048]