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A261339 as a simple table

na(n)
11
21
347500
420440
52
6124560
717850
82730
9185550
101
11518910
12429180
1310
14687480
1581030
1636
171568340
182
191165750
207410
2110
226780
23481140
2410
2510
265430
27240
282730
2972660
302080
3118700
32291720
33295080
3452860
355430
361
3781030
3856400
3912490
4043590
41124560
4240030
435170
44278700
452091850
46131320
47184110
4811206510
4912910
501245780

[1,1,47500,20440,2,124560,17850,2730,185550,1,
 518910,429180,10,687480,81030,36,1568340,2,
 1165750,7410,10,6780,481140,10,10,5430,240,2730,
 72660,2080,18700,291720,295080,52860,5430,1,81030,
 56400,12490,43590,124560,40030,5170,278700,
 2091850,131320,184110,11206510,12910,1245780]