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A103625 as a simple table

na(n)
10
20
32
44
534
662
7480
8870
96692
1012124
1193214
12168872
131298310
142352090
1518083132
1632760394
17251865544
18456293432
193508034490
206355347660
2148860617322
2288518573814
23680540608024
241232904685742
259478707895020
2617172147026580
27132021369922262
28239177153686384

[0,0,2,4,34,62,480,870,6692,12124,93214,168872,
 1298310,2352090,18083132,32760394,251865544,
 456293432,3508034490,6355347660,48860617322,
 88518573814,680540608024,1232904685742,
 9478707895020,17172147026580,132021369922262,
 239177153686384]