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A125517 as a simple table

na(n)
10
23
35
49
521
665
7321
81383
97221
1040414
11245312
121552223
1310217560
1469410576
15485081195
163473135825

[0,3,5,9,21,65,321,1383,7221,40414,245312,1552223,
 10217560,69410576,485081195,3473135825]